Carbon Monoxide (CO)

A colorless, odorless, tasteless gas that impedes the oxygenation of blood. CO is formed in large part by incomplete combustion of fuel.
Clean Air Act Amendments (CAAA)
The 1990 Clean Air Act is a piece of United States environmental policy relating to the reduction of smog and air pollution. It follows the Clean Air Act in 1963, the Clean Air Act Amendment in 1966, the Clean Air Act Extension in 1970, and the Clean Air Act Amendments in 1977. It was enacted by the 101st United States Congress (Pub.L. 101-549).