WASHINGTON – U.S. authorities on Tuesday proposed the first-ever federal regulations to cut the potent greenhouse gas methane by limiting emissions from the oil and gas industry. The four-part proposal by the Environmental Protection Agency is part of President Barack Obama’s Climate Action Plan, aimed at reducing pollution that is hastening human-caused climate change. However, the suggested changes will not, on their own, get the United States to its goal of cutting methane emissions from the oil and gas sector by 40 to 45 percent from 2012 levels by 2025, officials said. “We do project that our proposal will achieve...