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As iconic yellow buses transport children to and from school, their diesel engines deliver big doses of air pollutants. In response, school districts have started retrofitting their buses to cut tailpipe emissions. But a new study shows that while these measures may help clean outdoor air, they have virtually no impact on the air inside bus cabins ( Environ. Sci. Technol., DOI: 10.1021/es201070t ).
Bus diesel engines emit ultrafine particles that can easily penetrate lung tissues and enter the bloodstream, potentially causing cancers, asthma, and heart disease. Experts thought that these emissions worked their way into the bus cabin, resulting in elevated cabin pollution levels. The average concentrations of air pollutants inside a school bus can be three to 15 times greater than in average urban air, according to previous studies.
Other research has shown that retrofitting old buses with catalytic converters and other devices to reduce and capture emissions from the vehicles' exhaust systems can cut tailpipe emissions. But the effects of these modifications on air quality inside the bus have not been clear. Some studies have found reduced pollution levels inside buses, while others detected no significant changes. The confusion may stem from previous... Source
Keeping the air clean will keep your bird(and you) healthy and less susceptible to respiratory diseases. You can find them at: http://pureair.com/bird_dust_air_purifier.html where they carry the Austin Air Allergy Machine HEPA Air Purifier for Bird
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214 pagesCreator: Els Valkenburg, Kim Schoppink | 2009-06
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320 pagesCreator: Ron Beres, Lisa Beres | House & Home - 2010-04-06
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Price: $375.00
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