Time: The United States, China and Brazil all made new commitments to combat climate change Tuesday, in advance of a landmark United Nations conference on the issue in December. The U.S. and Brazil pledged to increase production of electricity from renewable sources to represent 20% of electricity production by 2030. Thats three times as much renewable energy as the U.S. currently produces and twice as much as is produced in Brazil, according to the White House. Brazil also announced new measures to...