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In 2000 Peugeot became the first manufacturer to sell a car (the Peugeot 607) with a diesel engine fitted with a particulate filter.
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In the developed world, the greatest source of particulate matter is from diesel engines.
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The diesel engine exhaust doubled the background particulate matter levels found outdoors at its peak.
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This will allow truckers to reduce emissions significantly (diesel emissions include nitrous oxides, particulate matter, and other air toxics and they are a major source of pollution in some areas).
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On the transportation side, we can rely more on diesel fuel, especially in combination with particulate filters that remove soot.
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That dominance is threatened by tightening emissions regulations governing nitrogen oxides and particulate matter--emissions that plague diesel engines in particular.
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Corning thinks those filters, which strip particulate emissions out of the exhaust of diesel engines, will soon be its next big hit.
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Public hybrid buses have been tested in New York to some success, according to the EDTA, which says the buses emit 90 percent less particulate matter and 30 percent fewer greenhouse gases than regular diesel buses.
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One of the pollutants was a fine particulate substance known as PM2.5, a major component of diesel exhaust which EPA had determined to be unsafe for inhalation at any level, particularly for health-impaired and elderly populations.
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