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The largest part of most combustion gas is nitrogen (N 2), water vapor (H 2 O) (except with pure-carbon fuels), and carbon dioxide (CO 2) (except for fuels without carbon); these are not toxic or noxious (although water vapor and carbon dioxide are greenhouse gases that contribute to climate change).
Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines.The primary emissions studied include hydrocarbons, volatile organic compounds, carbon monoxide, carbon dioxide, nitrogen oxides, particulate matter, and sulfur oxides.
Mainstream smoke is the smoke exhaled by a smoker. Sidestream smoke is smoke from the lighted end of a cigarette, pipe, or cigar, or tobacco burning in a hookah. This type of smoke has higher concentrations of cancer-causing agents (carcinogens) and is more toxic than mainstream smoke. It also has smaller particles than mainstream smoke.
In 2004, California approved the world's most stringent standards to reduce auto emissions, and the auto industry threatened to challenge the regulations in court. The new regulations required car makers to cut exhaust from cars and light trucks by 25% and from larger trucks and SUVs by 18%, standards that must be met by 2016. [ 28 ]
Included in Automotive Atrocities: The Cars We Love to Hate, author Eric Peters made note of the Sterling's shared development with the Acura Legend and wrote of it, "While Acura would go on to great things, the half-breed spawn of this odd one-night stand would go down as one of the greatest commercial flops ever . Given Acura's 'Sterling ...
California's Low-emission vehicle (LEV) program defines six automotive emission standards which are stricter than the United States' national Tier regulations. Each standard has several targets depending on vehicle weight and cargo capacity; the regulations cover vehicles with test weights up to 14,000 pounds (6,400 kg).
Blow-by, as it is often called, is the result of combustion material from the combustion chamber "blowing" past the piston rings and into the crankcase. These blow-by gases, if not ventilated, inevitably condense and combine with the oil vapor present in the crankcase, forming oil sludge.
In 2014, diesel exhaust pollution accounted for around one quarter of the pollution in the air and a high share of sickness caused by automotive pollution. [ 48 ] [ better source needed ] Diesel exhaust is a Group 1 carcinogen , which causes lung cancer and has a positive association with bladder cancer .