[HN Gopher] Mechanically strong yet metabolizable plastic breaks...
       ___________________________________________________________________
        
       Mechanically strong yet metabolizable plastic breaks down in
       seawater
        
       Author : anigbrowl
       Score  : 120 points
       Date   : 2024-11-22 02:07 UTC (20 hours ago)
        
 (HTM) web link (www.science.org)
 (TXT) w3m dump (www.science.org)
        
       | modeless wrote:
       | > can be water stabilized with hydrophobic coatings
       | 
       | So when they make takeout containers out of this it's going to be
       | coated with... something. I am suspicious of all these coatings
       | they're slapping on compostable food containers these days.
        
         | Terr_ wrote:
         | Perhaps some sort of food-grade wax? Although then you've got
         | to worry about _hot_ foods...
        
           | Mistletoe wrote:
           | My aunt got me a big wooden bowl in college and I was poor so
           | I ate popcorn out of it. I noticed the popcorn tasted weird
           | for quite some time. I finally put two and two together when
           | the coating had all come off the bottom. The hot popcorn and
           | oil had been removing the God knows what shiny finish and I
           | had been eating it. :(
        
             | asquabventured wrote:
             | Hopefully just food grade mineral oil and beeswax if it was
             | a wooden bowl.
        
               | Mistletoe wrote:
               | It was one of those you might get at Pier 1 or Kohl's
               | back then and had a really plasticky coating. Not my best
               | moment.
        
               | kaikai wrote:
               | Unfortunately mineral oil is derived from petroleum. I
               | don't care if someone says it's food grade, I wouldn't
               | want to eat it.
        
             | teekert wrote:
             | We've all eaten teflon coating at some point in our lives.
        
         | blitzar wrote:
         | I am suspicious of the food in the takeout containers.
        
         | sfink wrote:
         | Well, even vegetable oil is hydrophobic, so "something" needn't
         | be too horrible. (Oil would obviously wipe off too easily.)
         | 
         | Apparently soybean wax works well:
         | https://pmc.ncbi.nlm.nih.gov/articles/PMC7435775/
         | 
         | Though not for hot foods. It'll only work up to 50degC.
        
           | HeatrayEnjoyer wrote:
           | Or hot climates that reach >50 C
        
             | thaumasiotes wrote:
             | There's no reason you'd ever worry about that; no one can
             | use any object in such a climate, because they'd die.
        
               | HPsquared wrote:
               | People definitely live in places where it gets that hot.
               | (And note that's the air temperature in the shade, not
               | even surface temperatures in sunlight which can get much
               | hotter).
               | 
               | People survive because it's not 50degC all the time in
               | those hot places. And the wet bulb temperature is lower,
               | so sweating works (just about) to regulate body
               | temperature. Mostly air conditioning and shelter, though.
        
               | latexr wrote:
               | You have not been paying attention.
               | 
               | https://www.esa.int/Applications/Observing_the_Earth/Cope
               | rni...
               | 
               | https://www.theguardian.com/world/2024/mar/22/west-
               | africa-he...
               | 
               | https://www.bbc.com/news/science-environment-66229057
        
               | thaumasiotes wrote:
               | Those links aren't shy about explaining that people
               | exposed to that level of heat die. Here's the first one:
               | 
               | > According to a study recently published in Nature
               | Medicine, more than 60 000 people died because of last
               | year's summer heatwaves across Europe.
               | 
               | It's not necessary for your home food storage to be able
               | to survive temperatures that you can't. If it happens to
               | the food in your home, it will happen to you too.
        
               | latexr wrote:
               | People die with less heat. But clearly not everyone, and
               | it is _not_ true that:
               | 
               | > no one can use any object in such a climate, because
               | they'd die.
               | 
               | By the way, I know you can survive that heat because I
               | did. No air conditioner. It was excruciating and I don't
               | wish it upon anyone. Well, maybe on climate change
               | deniers, it would probably do them some good to suffer
               | through it to believe the science. They probably wouldn't
               | but at least they wouldn't be able to move to make it
               | worse, either.
        
             | jajko wrote:
             | Or simple locked car on a sunny day (maybe not during
             | winter), with dark interior. This can reach >90C over an
             | hour or two.
        
               | KevinGlass wrote:
               | No car interior has ever reached 90C. Did you mean 90 F?
        
               | Retric wrote:
               | Overall temperature isn't 90C but your lunch could be in
               | contact with those temperatures:
               | 
               | https://www.clickorlando.com/news/2019/09/26/heres-how-
               | hot-t...
               | 
               | "In a locked vehicle, a dark dashboard, steering wheel or
               | seat can often reach temperature ranges of 180 - 200
               | degrees F, which then warms the air trapped inside a
               | vehicle." 194F is 90C.
               | 
               | And that's Florida, other parts of the globe have higher
               | outdoor temperatures which result in higher internal
               | temperatures.
        
               | actionfromafar wrote:
               | Maybe not far off from 90, given you can fry eggs in open
               | air in the sun and for that you need 65.
               | 
               | https://www.youtube.com/watch?v=PhYkUuvDsGA
        
               | inetknght wrote:
               | > _No car interior has ever reached 90C._
               | 
               | Ever seen a car on fire? I have.
               | 
               | Ever seen a car on fire caused by heating from the sun?
               | Well maybe not. But I have seen an egg get cooked on the
               | roof of a car as a demonstration.
        
               | dredmorbius wrote:
               | "London skyscraper can melt cars and set buildings on
               | fire" (Sept. 3, 2013)
               | 
               |  _London isn 't famous for hot weather, but that may
               | change soon, and not because of global warming: The
               | design of a new skyscraper in the city is melting cars
               | and setting buildings on fire...._
               | 
               | <https://www.nbcnews.com/sciencemain/london-skyscraper-
               | can-me...>
               | 
               | Only one of several examples. Also the Vdara hotel in the
               | somewhat more probable location of Las Vegas, NV, the
               | Nasher Sculpture Center and Museum Tower, both in Dallas,
               | TX:
               | 
               | <https://www.atlasobscura.com/articles/when-buildings-
               | attack-...>
        
               | burnt-resistor wrote:
               | Have you ever been inside a hot car? Metal surfaces can
               | easily exceed 100C.
        
               | potato3732842 wrote:
               | Objects left on the dash of a black vehicle with gray
               | interior get into the 180s (F obviously). I measured
               | because it's where I cure small painted objects in the
               | summer. I live at at a medium northerly latitude.
               | 
               | 90C seems completely believable for hot climates.
        
           | ginko wrote:
           | There's also shellac.
        
             | burnt-resistor wrote:
             | Soluble in alkali environments. No thanks.
        
           | burnt-resistor wrote:
           | Borosilicate glass, metal, wood/bamboo/paper, ... there are
           | many existing choices without looking for or inventing an
           | impractical "flying car" option.
        
             | BadHumans wrote:
             | Downsides to using glass and wood for takeout should be
             | obvious and please don't put my soup in a paper takeout
             | container.
        
               | unethical_ban wrote:
               | What about the downside of takeout?
        
               | SauntSolaire wrote:
               | Okay so now your solution involves banning takeout.
               | 
               | Also leftovers are a thing.
        
               | chmod775 wrote:
               | A local chain here ships soup in some sort of
               | biodegradable coated-cardboard-bucket-thingies. They
               | still put a plastic lid on it, but I wouldn't dismiss
               | cardboard/paper.
               | 
               | They're good enough for transport, though they do degrade
               | pretty fast (they'll get leaky after a day or so).
        
               | trhway wrote:
               | >Downsides to using ... wood for takeout should be
               | obvious
               | 
               | I don't understand why our civilization has still not
               | replaced almost everything with bamboo (though
               | technically the bamboo is grass, not wood). It grows fast
               | (and an order of magnitude better sink for CO2 than
               | trees) and seems to be very usable as bamboo utensils
               | demonstrate for example.
        
         | dwallin wrote:
         | They specifically mention a coating in the abstract, parylene
         | C.
        
       | XorNot wrote:
       | Interesting that this is a thermoplastic - my first question is
       | how it performs as a 3D printer filament?
        
         | jtms wrote:
         | second question - does it/will it cost like $500 per 1kg spool?
        
         | sfink wrote:
         | The researchers are wondering, too. Last sentence in the
         | abstract:
         | 
         | > This approach can be extended to polysaccharide-based
         | supramolecular plastics that are applicable for three-
         | dimensional printing.
         | 
         | (So, they haven't done it yet, but are thinking about it.)
        
       | progre wrote:
       | > Plastics that can metabolize in oceans are highly sought for a
       | sustainable future.
       | 
       | Really? I think that putting more nutrients in the water is
       | almost as bad as having plastics floating around. The Baltic sea
       | for example, have dead zones caused by agricultural runoff.
       | 
       | Surely, the best would be to not put more stuff in the water?
        
         | relaxing wrote:
         | Well yeah but good luck with that.
        
         | pfdietz wrote:
         | The natural input of "nutrients" to the ocean is vast, compared
         | to the natural input of modern artificial plastics.
        
         | ruined wrote:
         | it is certainly good to not put more stuff in the water. i
         | would suggest it is even better not to make stuff that
         | shouldn't go in the water. but apparently a lot has already
         | been made and there's constantly more of it in the water, and
         | it looks like nobody is stopping
         | 
         | so if some major fraction of present production of that shit
         | that shouldn't go in the water can be eliminated, and satisfied
         | by an alternative that is not a persistent accumulating poison,
         | i'll take it
        
           | zo1 wrote:
           | Seems like a pretty easy problem to solve if you ask me:
           | 
           | https://www.scientificamerican.com/article/stemming-the-
           | plas...
           | 
           | Someone should send this link to Trump and Elon Musk so
           | America and the EU can slap some actual serious and economy-
           | breaking tariffs on those countries. I know that sounds
           | snarky and drastic and funny and off-topic, but we seriously
           | need actual serious politicians that just get shit done.
           | We've tried the "reasonable politicians" approach so far,
           | maybe it's time to bring in people that are _unpalatable_ but
           | actually willing to break shit and blockade some actual evil
           | people and countries around the world in order to make
           | positive change.
        
             | Nevermark wrote:
             | There seems to be a high correlation with people who are
             | enthusiastic about breaking things to enable "simple"
             | solutions, being legislative blockaders (instead of
             | negotiators) of forming good policy from/with others, and
             | not caring about external costs to the point of making that
             | a vocal policy point.
             | 
             | A lot of damage is done in the name of real problems,
             | associated with high frustration, leveraged politically.
        
         | graemep wrote:
         | Depends on what you put in, how much, and where.
         | 
         | I do not think moderate quantities of nutrients are a problem,
         | and very likely has benefits.
        
           | emilamlom wrote:
           | What the other commenter is alluding to is that, if this
           | comes into widespread use, it won't just be a moderate
           | amount. We produce mind-boggling amounts of plastic waste and
           | a lot of it would concentrate in rivers and estuaries.
        
             | graemep wrote:
             | It will be a moderate amount compared to the amounts that
             | produce dead zones.
        
             | Tagbert wrote:
             | These would not break down into the kinds of nutrients that
             | cause algal blooms and dead zones. That is cause by
             | nitrogen and phosphorus runoff.
        
               | emilamlom wrote:
               | That's interesting. I didn't have access to the paper,
               | just the abstract, so didn't know it was different.
        
         | throwup238 wrote:
         | Plastics are mostly carbon and hydrogen atoms, neither of which
         | are even remotely limiting factors because autotrophs at the
         | bottom of the food chain produce plenty of both from water and
         | carbon dioxide.
         | 
         | Agricultural runoff is mostly nitrogen and phosphorus, which
         | _are_ limiting factors (hence why we have to supplement them in
         | agriculture).
        
           | Terr_ wrote:
           | > Plastics are mostly carbon and hydrogen atoms
           | 
           | In general, _this particular_ stuff is significantly
           | different.
           | 
           | The article mentions sodium hexametaphosphate [0] and
           | guanidinium sulfate [1], which have phosphorous and nitrogen
           | respectively. Those are both common in fertilizers and are
           | implicated in algal blooms.
           | 
           | [0] https://pubchem.ncbi.nlm.nih.gov/compound/Hexasodium-
           | hexamet...
           | 
           | [1] https://pubchem.ncbi.nlm.nih.gov/compound/Guanidinium-
           | sulpha...
        
         | Terr_ wrote:
         | If you mean _this particular_ thing because it involves
         | compounds [0][1] with nitrogen and phosphorous, then I agree it
         | 's a valid concern to look at.
         | 
         | However for existing plastics _in general_ --mostly carbon,
         | hydrogen, and oxygen--it's less of an issue. Just because a
         | material _can_ be metabolized doesn 't necessarily mean it's a
         | _rich_ source of energy, or that the chemicals in it will
         | unlock some limiting-factor that was holding back a population-
         | boom.
         | 
         | Just to prove it's possible, consider lignin, another C/H/O
         | polymer and the core component of wood. It was ecologically un-
         | digestible for a long time until something (fungi) evolved to
         | dismantle it efficiently. Yet even now, its breakdown is a
         | slow, low-margin process that occurs in the background.
         | 
         | ____
         | 
         | Side note: The long delay between the evolution of trees and
         | the evolution of something to eat wood has been suggested as a
         | cause of coal formation, but it is disputed. [2]
         | 
         | [0] https://pubchem.ncbi.nlm.nih.gov/compound/Hexasodium-
         | hexamet...
         | 
         | [1] https://pubchem.ncbi.nlm.nih.gov/compound/Guanidinium-
         | sulpha...
         | 
         | [2] https://www.pnas.org/doi/10.1073/pnas.1517943113
        
       | burnt-resistor wrote:
       | We've heard the "biodegradable" greenwashing scam of plastic
       | technology advances over and over again. Maybe we shouldn't be
       | seeking continued use of toxic petrochemical processes and should
       | instead change our storage and packaging materials to be less
       | hazardous and more reusable, because many other options already
       | exist.
        
         | 1minusp wrote:
         | This. There seems to be one of these announcements every so
         | often, and i havent seen any of them used at scale, or making
         | any kind of dent in the status quo.
        
         | InDubioProRubio wrote:
         | That will be 5 $ more per butterstick, for the logistics of
         | reusable porcelain butter packages.. which have to be
         | collected, washed and shipped. Which makes it a rich people
         | feel good status-symbol luxury, sadly.
        
           | vhcr wrote:
           | Or you know, supermarkets would purchase 50kg blocks of
           | butter and fraction it, clients would then be responsible for
           | bringing their own reusable containers.
        
             | layer8 wrote:
             | You'd still have to pay the employee who'd be responsible
             | for cutting and weighing the butter for each customer, and
             | taking payment for the butter (or however else that would
             | work). Or build a machine that does it. Not sure how the
             | cost for that would work out, or the machine's ecological
             | footprint in comparison.
        
               | jdietrich wrote:
               | Plus all of the food hygiene and logistical implications
               | of handling products in bulk, multiplied by the 30,000
               | different products in a typical supermarket.
               | 
               | I don't know about the US, but in my country butter is
               | packaged in waxed paper, which is fully biodegradable.
        
               | Loughla wrote:
               | >multiplied by the 30,000 different products in a typical
               | supermarket
               | 
               | It's almost like we're going to have to reduce our
               | consumption or something. Maybe we don't need 200
               | different kinds of cereal and 300 different kinds of
               | coffee available every single day.
        
               | Tagbert wrote:
               | And due to the labor, it can only handle a low volume of
               | goods with a high markup. When I go there, you end up
               | waiting in line to be helped by the one or two people
               | working that counter. Meanwhile, the cheaper, prepackaged
               | foods can be picked up as needed.
        
               | layer8 wrote:
               | It wouldn't be that different from how a lot of cheese is
               | being handled where I live. Except they currently put the
               | cuts into plastic wrappings (which are "sealed" by the
               | price sticker) instead of customer-provided containers.
               | On the other hand, for fruits we already do use nets
               | brought by the customer, and the weighing happens at the
               | checkout.
        
               | riffraff wrote:
               | In my hometown in Italy you can ask to put your cheese or
               | cold cuts from the counter in a container you provide.
               | 
               | I'm not sure this ends up as a net positive compared to
               | the paper with plastic lining they provide tho, since you
               | have to wash the container at some point.
        
               | antisthenes wrote:
               | > I'm not sure this ends up as a net positive compared to
               | the paper with plastic lining they provide tho, since you
               | have to wash the container at some point.
               | 
               | Unlike different kinds of plastic, water is 100%
               | recyclable and doesn't come from nasty petrochemicals in
               | the first place.
        
               | mrguyorama wrote:
               | My local supermarket chains already do that. It's called
               | the Deli Counter. The cost is not a big deal.
        
             | gwbas1c wrote:
             | No one will actually do that, except the few weirdos who
             | think that it's a good idea.
             | 
             | Remember: "Reusable" containers also have an environmental
             | cost. Each container will be used, on average, X times.
             | Then it will break, or otherwise end its useful life, and
             | end up in a landfill too.
             | 
             | Don't assume that a "reusable" container is better for the
             | environment: My house is full of free, pristine, reusable
             | water bottles that are gifts, souvenirs, ect. My kids go
             | through about 2 reusable water bottles a year, each.
        
               | wholinator2 wrote:
               | I mean, of course it's not perfect. But isn't 2 water
               | bottles in a land fill orders of magnitude better than
               | 300? Isn't the reduction of bulk trash the point? Why
               | would the fact that a glass container can break make it
               | not still a better alternative to 50 plastic ones?
        
               | gwbas1c wrote:
               | > But isn't 2 water bottles in a land fill orders of
               | magnitude better than 300?
               | 
               | I think you're making a lot more assumptions than you
               | think:
               | 
               | For example, glass vs glass: My single-use glass
               | container may be recyclable, but the fancy glass reusable
               | one isn't.
               | 
               | Aluminum: Aluminum cans are highly recyclable. Is your
               | metal reusable water bottle recyclable?
               | 
               | Plastic: Ooooh, I won't go there.
        
               | kaikai wrote:
               | I've had the same steel water bottle for over 10 years.
               | Just because you don't reuse things well doesn't mean
               | it's impossible.
        
               | syndicatedjelly wrote:
               | What were the inputs like to manufacture the steel
               | container?
        
               | trollbridge wrote:
               | Probably less than 3.650 plastic bottles, assuming he
               | drinks one per day.
        
               | gwbas1c wrote:
               | I stress the word "free" here. Most of them were gifts.
               | 
               | See https://news.ycombinator.com/item?id=42214319
        
             | fragmede wrote:
             | Butter is, perhaps, a bit sticky for that, but my local co-
             | op has various bulk grains and flour and beans and such
             | that customers can bring their own containers for.
        
           | riffraff wrote:
           | Not arguing the general point, for which I agree, but isn't
           | butter commonly sold in aluminum foil wrappers?
        
           | AlotOfReading wrote:
           | Butter used to be packaged in wax paper, which was (then)
           | biodegradable. The plastic packaging is about branding and
           | shipping, not cost.
        
             | potato3732842 wrote:
             | It still is.
             | 
             | Well maybe not at Whole Foods, I've never been in one, but
             | at Walmart it's four wax-paper wrapped sticks in a
             | cardboard box.
        
               | kaikai wrote:
               | Do you know that it's waxed paper, and not plasticized
               | paper? Genuine question, since I imagine "wax" paper is
               | either plasticized or using petroleum-based waxes.
        
           | Aloisius wrote:
           | Your sticks of butter come wrapped in plastic?
           | 
           | I don't think I've ever seen anything other than wax paper or
           | foil, with only tubs of butter, rather than sticks, in
           | plastic.
        
             | njtransit wrote:
             | Up until earlier this year, many "grease proof" papers
             | (e.g. butter wrappers) were PFAS.
        
               | Aloisius wrote:
               | PFAS aren't plastics.
               | 
               | And removing them clearly didn't increase the price of
               | sticks of butter by $5.
        
               | atombender wrote:
               | A lot of plastic containers use fluorine-treated plastic
               | [1], resulting in the creation of PFAS. The fluorine is
               | used to strengthen the plastic and make it less
               | permeable.
               | 
               | > Since EPA released its investigation, we have learned
               | the disturbing fact that the fluorination of plastic is
               | commonly used to treat hundreds of millions of
               | polyethylene and polypropylene containers each year
               | ranging from packaged food and consumer products that
               | individuals buy to larger containers used by retailers
               | such as restaurants to even larger drums used by
               | manufacturers to store and transport fluids.
               | 
               | [1] https://blogs.edf.org/health/2021/07/07/beyond-paper-
               | pfas/
        
             | SoftTalker wrote:
             | A lot of "butter" spreads are sold in plastic tubs.
        
         | StableAlkyne wrote:
         | It's very easy to say "why don't we just stop using toxic
         | petrochemicals," but very hard to do in practice. For a
         | sustainability advancement to be considered a success, it has
         | to actually replace something. To replace something, it:
         | 
         | - has to be affordable, or people will refuse to buy it. The
         | general public cares more for its wallet than the environment.
         | 
         | - has to be at least as performant as what it's replacing, or
         | people won't want to change. The general public is not going to
         | buy an inferior product in the name of sustainability.
         | 
         | - has to be more environmentally friendly than what preceeded
         | it, or it has no benefit.
         | 
         | If you can find a more environmentally friendly material that
         | is able to replace plastic, achieve its physical properties, at
         | the same cost, then patent it and you will be very wealthy. And
         | will have outplayed the billions (probably a lowball) being
         | dumped into this by governments, universities, and private
         | companies around the world.
         | 
         | Also, the reason most of these articles hype their own work up
         | is because the name of the game in academia is grant money. If
         | a funding agency doesn't think your work is impactful, they'll
         | give it to someone who is. That's why articles rarely describe
         | their incremental work as just being incremental.
        
           | hcarvalhoalves wrote:
           | You seem to believe plastic containers are used due to being
           | a more affordable and technically superior solution. That's a
           | common mistake.
           | 
           | The true reason it's so cheap and available, is subsidies. $7
           | trillion as of 2023, to be exact.
           | 
           | Without subsidies, using a non-renewable, expensive to
           | harvest resource, to produce single-use plastic would be an
           | absolutely irrational decision.
           | 
           | https://www.imf.org/en/Blogs/Articles/2023/08/24/fossil-
           | fuel...
        
             | incrudible wrote:
             | This bogus number comes from putting a value on the
             | supposed environmental cost, but that is not what subsidy
             | means in the economic sense. We already established that if
             | we somehow could globally settle on a price for
             | externalities, alternatives would be competitive, but they
             | would still be intrinsically more expensive.
        
               | leptons wrote:
               | Except it isn't a "bogus number". Fossil fuel subsidies
               | are real.
               | 
               | > _" It's not just the US: according to the International
               | Energy Agency, fossil fuel handouts hit a global high of
               | $1 trillion in 2022 - the same year Big Oil pulled in a
               | record $4 trillion of income."_
               | 
               | https://www.budget.senate.gov/chairman/newsroom/press/sen
               | -wh...
               | 
               | I say give the subsidies to environmentally friendly
               | producers instead, that don't use fossil fuels as the
               | base material for producing packaging products. $1
               | trillion in one year is just an unfathomable amount of
               | money to give away to corporations that are already
               | making record profits far above the $1 trillion they
               | already get.
        
             | dredmorbius wrote:
             | You'd want to factor in _externalities_ as well, both on
             | the extraction side (fossil fuels are phenomenally under-
             | priced, likely by a factor of _millions_ ), and disposal
             | (environmental impacts of discarded plastics and pollution
             | during manufacture).
        
           | mathgradthrow wrote:
           | It doesn't have to be cheap, It just has to be made cheaper
           | artificially with globally enforced taxes.
           | 
           | The number one economic role of government is mitigating
           | externalities that arise from free trade, often through the
           | restraint of that trade.
        
             | Spivak wrote:
             | Congrats you just made everyone subject to those taxes
             | artificially worse off. People aren't stupid and can see
             | what you did. You will be voted out of office next term. If
             | you're going to artificially adjust prices it's got to go
             | the other way where you subsidize the behavior you want. It
             | worked with lightbulbs.
        
               | ant6n wrote:
               | Or perhaps everyone is actually better of if negative
               | externalities are taxed.
        
               | Spivak wrote:
               | You made a change which caused consumer prices to go up,
               | folks are already struggling financially it doesn't
               | matter if it's for a good reason.
               | 
               | This is the "I know _you 're_ struggling but the economy
               | is actually doing great" but applied to environmentalism.
        
               | WillPostForFood wrote:
               | Or perhaps everyone is worse off because some well
               | connected lobbyist got the government to mandate their
               | more expensive, less effective product.
        
             | anigbrowl wrote:
             | _globally enforced taxes_
             | 
             | Why not just pass a law requiring everyone to be good?
        
           | chiffre01 wrote:
           | I would be interested to know the cost of more sustainable
           | packaging at economies of scale. Almost all plastic-based
           | packaging emerged after 1950, yet even before then, there was
           | a need to package mass consumer goods on a large scale.
           | 
           | I also believe plastic and PFAS coatings are used in
           | packaging largely because they are assumed to be the only
           | suitable materials. However, in earlier times, there were
           | many clever and cost-effective solutions.
        
             | georgyo wrote:
             | Population of the world in 1950 was 2.5 billion. The
             | population of the world has over tripled. This world put a
             | lot of scaling pressure on everything.
             | 
             | I didn't think plastics are used because they are
             | considered the only submittable suitable material, but they
             | are definitely the cheapest and easiest to use. You cannot
             | injection mold wood to be the exact shape and size with a
             | snug fit for something you are packaging.
        
               | dredmorbius wrote:
               | The fraction of the world's population regularly
               | consuming manufactured and packaged goods is also
               | increasing. That increases discarded plastics and other
               | materials.
               | 
               | About a decade ago I tracked down the somewhat
               | provocative claim that contemporary New Yorkers (city,
               | not state) produced _less_ refuse, by mass, than those of
               | the 1930s. My first thoughts were that total packaging
               | weight and waste food might account for this, older
               | packaging materials being more ecologically-friendly, but
               | generally more massive: wood, glass, metal, etc., and
               | refrigeration and food preservation less developed.
               | 
               | Good guesses, but wrong as it happens.
               | 
               | The culprit was _coal ash_ , on the order of 40% of all
               | rubbish by weight. It had been > 80% in 1900.
               | 
               | Building heat was supplied by boilers running on coal.
               | That left a large quantity of fly ash as residue. As
               | heating switched to natural gas and cogeneration steam
               | from the 1950s through the 1960s, coal use was largely
               | eliminated.
               | 
               | Former generations of New Yorkers would often refer to
               | receptacles as _ash cans_ , and they were traditionally
               | made of galvanized steel, both useful when contents might
               | contain glowing coals. As trash evolved to colder refuse,
               | plastic bins or bags could be substituted. "[T]he New
               | York City Sanitation Department began encouraging the use
               | of plastic garbage bags in 1969." (<https://archive.nytim
               | es.com/cityroom.blogs.nytimes.com/2007/...>)
               | 
               | Net _non-coal_ refuse has increased, but the total, at
               | least as of a decade ago, was still below the early-20th-
               | century high point. Much of the current total however
               | _is_ plastics, and in particular disposable diapers.
               | 
               | I'd had additional sources on this at one point though I
               | can't locate them presently.
               | 
               | This paper discusses composition and confirms the 40% &
               | 80% figures above:
               | 
               | "How New York City Residents Diminished Trash", Paul E
               | Waggoner and Jesse H. Ausubel, The Connecticut
               | Agricultural Experiment Station, New Haven andRockefeller
               | University, New York. October 2003.
               | 
               | <https://phe.rockefeller.edu/wp-
               | content/uploads/2019/09/NYTra...>
               | 
               | The NYT article above also confirms "ash cans".
        
           | kazinator wrote:
           | > _The general public cares more for its wallet than the
           | environment._
           | 
           | More or less, yes, but I think it deserves more nuance. Most
           | of the general public is stuck trying to make ends meet, and
           | regard the environment as a problem to be solved by their
           | government and rich corporations.
           | 
           | If you take away their plastic bags and straws, they will
           | make do.
        
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