Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Protests, Warnings, US Retreat Add Urgency to UN Climate Talks Associated Press MADRID - Mass protests, a last-minute venue change and talk of climate tipping points are adding some unplanned drama to this year's international talks on tackling global warming. Delegates from almost 200 countries had planned to put the finishing touches to the rules governing the 2015 Paris accord, ironing out a few wrinkles left over from last year's conference in Katowice, Poland, and setting the scene for a major review of their efforts in 2020. But then Brazil pulled its offer of hosting the talks and stand-in Chile, rattled by anti-government protests, canceled five weeks before the meeting. Next, President Donald Trump served formal notice that the United States was quitting the Paris accord, delivering a symbolic blow to one of his predecessor's signature achievements. And scientists? Well, they didn't have any good news either. Study after study published in recent months has underscored the rapid pace of global warming and the need to cut emissions of greenhouse gases as soon as possible. Against that backdrop, the Dec. 2-13 meeting in Madrid has gained fresh urgency. .