Study - USA - NJ school buses cleaner than most, but have a ways to go
New Jersey,USA -Newsday (Long Island,NY)/Associated Press, by GEOFF MULVIHILL -May 24, 2006: -- New Jersey's efforts to clean up soot emissions from diesel-powered school buses are getting "poor" marks according to a national report... But state environmental officials say a new program should improve the state's grade... The Union of Concerned Scientists, a Cambridge, Mass.-based advocacy group, rated the states in two areas: how much soot buses pump into the environment and how well states do at cleaning the soot up... On the amount of soot _ which scientists say is linked to asthma, cancer and heart disease, especially among children _ New Jersey got a "B". The group of scientists said the reason for such a high grade was largely that New Jersey has a relatively young fleet of buses averaging about seven years old. The state mandates that large buses be retired after 12 years... But through 2005, controls mandated by the state were reducing soot emissions by only .3 percent compared to the national average of 2.2 percent. California did the most, with policies to reduce soot by 8.7 percent...
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