Reuters: A U.S. Senate bill introduced on Tuesday would give the Commodity Futures Trading Commission full authority over markets that buy and sell pollution permits issued to companies as part of a climate change plan to cut greenhouse gas emissions. Such markets will be critical to the success of a U.S. cap-and-trade system that allows companies to trade carbon allowances, which are permits to emit one metric ton of carbon dioxide that is a cause of global warming. Under the climate …