U.S. climate czar John Kerry claimed in an interview on Sunday that “so much has been invested in clean energy that there can be no rolling back of moves to end carbon emissions,” according to an interview with the Associated Press. Kerry claimed that if countries phase out petroleum-based fuels, the world can purportedly limit average global warming to 1.7 degrees Celsius (2.7 degrees Fahrenheit). “We’re in a very different place than where we were a year ago, let alone two and three years ago,” Kerry said. “But we’re not doing everything we said we’d do,” he said, after attending...