Associated Press: Weber County is using garbage dumped in landfills to make some extra cash. The county and Wasatch Integrated Waste Management District already turn methane gas generated in trash heaps into electricity. Now they’re also making money by selling carbon offset credits they’ve been awarded for reducing greenhouse gases. Last spring the county made $102,000 selling credits at the Chicago Climate Exchange, said Gary Laird, the county’s solid waste manager. The credits …