New York Times: Just as the world seemed poised to combat global warming more aggressively, the economic slump and plunging prices of coal and oil are upending plans to wean businesses and consumers from fossil fuel. From Italy to China, the threat to jobs, profits and government tax revenues posed by the financial crisis has cast doubt on commitments to cap emissions or phase out polluting factories. Automakers, especially Detroit`s Big Three, face collapsing sales, threatening their plans to …