Bloomberg: The European Unions carbon market, designed to save the environment, is being undercut by a patchwork of national subsidies for renewables and misaligned energy policies that have helped cut in half the volume of power being traded. The bloc wasted a quarter of the $550 billion spent on renewable energy, according to analysis by consulting firm Bain & Co. presented last month at the World Economic Forum in Davos, Switzerland. Some energy-saving policies cost more than 18 times the price of the...