European officials are preparing to introduce ambitious legislation designed to wean one of the world’s biggest and most polluting economies off fossil fuels far more quickly than other nations have pledged to do. The proposals could include phasing out coal as an electricity source as well as imposing tariffs on polluting imports — an idea with the potential to set off global trade disputes. The European Commission’s package of around a dozen legislative proposals, expected on Wednesday, is designed to swiftly reduce the emissions of planet-warming gases and meet an ambitious climate goal, already enshrined in law: The 27-nation bloc has said it will cut its emissions of greenhouse gases by 55 percent by 2030, compared to 1990 levels. The legislation is expected to be in sharp contrast to vague aspirations by various other countries to neutralize their emissions by midcentury. “It’s not just a big promise,” said Jennifer […]