(Boston, MA December 4, 2013) The most rigorous emissions
testing ever done for modern heavy-duty diesel engines – which power virtually
every large truck and bus sold in the United States – has demonstrated a
greater than 94% reduction in the levels of nitrogen dioxide (NO2 -
an important contributor to ozone smog), and substantial reductions in all
other pollutants, even when compared to engines first marketed to meet 2007
standards, according to a study released today by the Coordinating Research
Council (CRC[1]) at www.crcao.org. For a number of the
most important pollutants, levels were substantially lower than required by
regulations. These 2010 engines represent the newest generation of
emission control technology. They were developed in response to the US
Environmental Protection Agency Heavy-Duty On-Highway Diesel Emissions Rule of
2001 which mandated the implementation of strict NOx standards starting in
January 2010. The rule also mandated the implementation of a stringent PM
standard in engines to be sold starting in January 2007.

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