From Twitter https://twitter.com/drsekula: RT @TheEconomist: The withdrawal of the worldâ^TMs second-largest polluter (behind China) cannot but have an impact http://www.economist.com/news/international/21722914-china-and-europe-plan-lead-climate-efforts-whither-world-after-americas-retreat?fsrc=scn/tw/te/bl/ed/theparisagreementwhithertheworldafteramericasretreat