Reuters: A climate control bill that Democratic leaders hope to move through the U.S. Senate will seek to give companies a substantial number of pollution permits, potentially worth billions of dollars, rather than sell them, an aide to a key Democratic senator said on Friday. There will be a "significant role" for allocations — or free permits — in the Senate bill, similar to the approach taken by the global warming legislation recently passed by the U.S. House of Representatives, the aide …