Urban Air Pollution. Essay
The transportation sector is responsible for a large majority of air pollutants in our urban areas, including carbon monoxide and nitrogen oxides, which form ground-level ozone. Tens of millions of Americans live in areas not meeting at least one federal air quality standard. In 1990, Congress passed the Clean Air Act Amendments to combat high emission levels of carbon monoxide, nitrogen oxides and the creation of ground-level ozone by petroleum-based transportation fuels. This Act specifically required the production and distribution of cleaner-burning gasoline, containing oxygenates such as ethanol, in America's most polluted cities. Tougher emissions standards are also …show more content…
Another source of water pollution from gasoline is groundwater pollution. According to the U.S. Environmental Protection Agency, more than a quarter of the nation's one million underground gasoline and oil tanks leak, causing considerable groundwater contamination. Besides direct oil spills and leakage, secondary water pollution from petroleum is also a problem. Oil and gas leakage from cars and trucks is collected on pavement and is carried to streams and lakes whenever the pavement is wet and water drains across it, causing environmental damage to aquatic plant and animal life.
Ethanol can replace the most toxic parts of gasoline with a