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I am writing to express my deep concern about the negative health
impacts of diesel pollution from trucks and buses and I urge the
California Air Resources Board to adopt the strongest regulation
possible to clean up the top sources of diesel particulate matter
in California.

As director of the Program on Community Change and Public Policy,
at UC Berkeley,
I've worked with many of our lowest-income communities in the
state. The statistical evidence regarding  health effects from
industrial diesel traffic is
overwhelming! 

California has the worst air quality in the nation and trucks and
buses are a major contributor to the particulate matter and ozone
pollution that causes serious health consequences. Pollution from
trucks and buses result in an estimated 4,500 premature deaths and
71,000 cases of asthma and lower respiratory symptoms each year.
Equally important, truck drivers are 1.5 to 2 times as likely as
workers not exposed to diesel exhaust to develop lung cancer during
their lives.

On behalf of my family and all communities in California, I am
asking the California Air Resources Board to adopt the strongest
possible diesel truck regulations.