Subj : Re: EVs
To   : Adept
From : Spectre
Date : Mon Oct 23 2023 06:49:00

 DW> But there's still a question about cause and effect.  Did the extinction
 DW> event happen because of CO2 levels, or did CO2 levels rise because of
 DW> the extinction event?

 Ad> I think there was some evidence that the change in CO2 levels came before
 Ad> the extinction events, but, yeah, if it's just two things at the same
 Ad> time, then, sure, harder to tell.

At some stage in the past.. the atmosphere had pretty much no free oxygen and
a far larger percentage of CO2.  The great Oxidation event killed most of
what was around before it. So things change...Its probably also food for
thought for the greenhouse gas club too... in geological time we may just be
living in an abberation.

If you think something like the chicxulub impact, then you'd have to expect
any increase in CO2 is due to the cook off of most of the planetary surface,
you burn all that, that's got to be consuming oxygen hand over fist. But its
your following "nuclear winter" that's probably got to hurt the most.

The other mostly likely is an extra belt of S02 due to natural phenomena like
volcanic action.  Its an irritant and also contributes to cooling by
producing haze, along with the solids to give you a Volcanic winter.

Spec


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