U.S. ACTIONS ON GREENHOUSE GASES.

The article reports on the United States' climate-change policies. According to the article, about 13 bills have been introduced in the U.S. Congress that take varied approaches to reducing greenhouse gas emissions such as tax on fossil fuels and a mandatory system in which carbon dioxide emissions are capped. A group of senators has introduced the America's Climate Security Act that combines elements of 12 previous climate-change proposals.