Some wind-energy plants in Spain were registered as solar-power generators and claimed the higher subsidy given to installations that harness sunlight, a regulatory investigation has found. The National Energy Commission’s probe, originally to look for irregularities in solar power production, discovered that some owners of wind turbines in Spain had sold power as if they were operating solar photovoltaic panels… Solar plants can earn as much as 44 cents per kilowatt hour in Spain, more than six times the rate that wind farms receive.—British tax investigators found guns and “huge piles of cash” as they arrested four men suspected of taking part in a £38m carbon trading fraud.