KTHV: World leaders from 175 countries signed the historic Paris climate accord Friday, using Earth Day as a backdrop for the ceremonial inking of a long-fought deal that aims to slow the rise of harmful greenhouse gases. "We are in a race against time." U.N. secretary-General Ban Ki-moon told the gathering at the United Nations headquarters in New York. "The era of consumption without consequences is over." "The poor and most vulnerable must not suffer further from a problem they did not create," Ban...