Countries are not doing enough to cut emissions that cause climate change, according to a new report from United Nations scientists. And the United States is a big part of the problem. The U.S. sticks out as the only major economy where planet-warming pollution increased dramatically last year, the report notes. Among the world's largest emitters of greenhouse gases, the U.S. was tied last year with Russia for the most emissions per capita. China emits significantly more total greenhouse gases each year than the U.S., but has more than four times the population. Overall, global emissions were basically the same last year as they were the previous year. U.S. emissions grew because of increased electricity demand, as well as Trump administration policies that support the burning of fossil fuels. The Trump administration has ordered coal-fired power plants in the U.S. to stay open longer than planned, rolled back fuel-efficiency standards for vehicles and ended tax credits for solar and wind projects. Those policies have made the U.S. an outlier when it comes to escalating greenhouse gas emissions, says Inger Andersen, the executive director of the U.N. Environment Programme. "Right now, everybody is scrambling a little bit regarding energy security," Andersen...