Environment of Pakistan
The Air pollution is the release of chemicals and particulates into the atmosphere. Common gaseous pollutants include carbon monoxide, sulfur dioxide, chlorofluorocarbons (CFCs) and nitrogen oxides produced by industry and motor vehicles. Photochemical ozone and smog are created as nitrogen oxides and hydrocarbons react to sunlight. Particulate matter, or fine dust is characterized by their micrometre size PM to PM. The air in Karachi is rapidly polluted by automobile smoke, especially Rickshaws and Buses, industrial emissions, open burning of garbage, house fires, and other particles but the government and environment organizations seems non-serious to tackle the issue timely.
The two-stroke engines on rickshaws and motorcycles are one of the major polluters of air in Karachi and the rest of Pakistan. The two-stroke engines as well as defective or unturned vehicles are major polluters with carbon dioxide emissions. Two-stroke engines as well as defective vehicles using substandard lubricant are major emitters of sulfur dioxide and smoke. Automobiles operating on compressed natural gas and liquefied petroleum gas are major air polluters.
U.S. Steel
Researchers at the Political Economy Research Institute have ranked U.S. Steel as the eighth-greatest corporate producer of air pollution in the United States (down from their 2000 ranking as the second-greatest). In 2008, the company released more than one million kg (2.2 million pounds) of toxins, chiefly ammonia, hydrochloric acid, ethylene, zinc compounds, methanol, and benzene, but including manganese, cyanide, and chromium compounds. In 2004, the city of River Rouge, Michigan and the residents of River Rouge and the nearby city of Ecorse filed a class-action lawsuit against the company for "the release and discharge of air particulate matter...and other toxic and hazardous substances" at its River Rouge plant.