New York Times: Hillary Rodham Clinton has promised a series of initiatives to address the challenge of climate change. The first installment, unveiled this week in Iowa, calls for an aggressive expansion of wind, solar and other carbon-free energy sources so that they provide one-third of Americas electricity by 2027 enough, she says, to power every home in the country. Mrs. Clinton at least is willing to confront global warming, which her prospective Republican opponents have been doing their best to avoid,...