Science warnings, US retreat add urgency to UN climate talks

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ARITZ PARRA and FRANK JORDANS Associated Press MADRID (AP) — 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 hoped 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 o
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