CQPolitics: House legislation to address climate change would cost households an average of $175 a year in 2020, the Congressional Budget Office said in a June 19 report. The bill, which could move to the House floor this summer, would limit emissions of greenhouse gases and direct companies to buy and sell pollution allowances in order to meet the cap. The CBO report could undercut frequent Republican claims that the bill would cost households as much as $3,128 a year. However, GOP …