Name a component of gasoline that has been classified by the U.S.
EPA as a "known human carcinogen".
Answers
ANSWER: XENZENE.....
Gasoline, petrol (British English) or gas (American English) is a colorless petroleum-derived flammable liquid that is used primarily as a fuel in spark-ignited internal combustion engines. It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives. On average, a 42-U.S.-gallon (160-liter) barrel of crude oil yields about 19 U.S. gallons (72 liters) of gasoline after processing in an oil refinery, though this varies based on the crude oil assay.
The characteristic of a particular gasoline blend to resist igniting too early (which causes knocking and reduces efficiency in reciprocating engines) is measured by its octane rating. Gasoline is produced in several grades of octane rating. Tetraethyl lead and other lead compounds are no longer used in most areas to increase octane rating (still used in aviation and auto-racing). Other chemicals are frequently added to gasoline to improve chemical stability and performance characteristics, control corrosiveness and provide fuel system cleaning. Gasoline may contain oxygen-containing chemicals such as ethanol, MTBE or ETBE to improve combustion.
EPA Administrator William K. Reilly today announced the final conclusions of EPA's assessment on the respiratory health effects of passive smoking. The assessment concludes that Environmental Tobacco Smoke (ETS), also known as secondhand smoke, is a human lung carcinogen, responsible for approximately 3,000 lung cancer deaths annually among U.S. non-smokers. It also concludes that passive smoking results in serious respiratory problems for infants and young children.
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