U.S. Environmental Protection Agency has released a draft report
saying current emissions standards it introduced in 1997 may not
be adequate and should be tightened further.
a 400-page paper, the EPA says new standards – including the reduction
of hydrocarbons and nitrogen oxide emissions from diesel engines
made after 2002 – do not adequately protect the elderly and people
with respiratory problems.
findings could become the basis for even more demanding pollution-control
requirements to reduce the amount of microscopic soot emitted by
trucks, cars, factories and power plants. The analysis recommends
the allowable concentrations be reduced further as much as 50 percent.
EPA soon expects to determine what areas of the United States may
have to impose additional pollution-control measures because their
air is so dirty it does not meet the standard. This could put the
EPA at odds with industry groups like trucking fleets and engine
manufacturers, which complained the 1997 rules were based on uncertain
science and would cost industry tens of billions of dollars.
industry challenged the standards to the Supreme Court, which eventually