|
 Many
residents of northeast Portland, an industrial area near the I-5 freeway
corridor, have a lower-than-average income. Residents of the area have
a rate of asthma higher than the state and national averages (about
14 percent compared to about 7 percent), according to a survey conducted
by researchers from Lewis and Clark College.
There are some differences in the surveys used to establish asthma rates
for the various areas, so more research is underway, said Bruce Podobnik,
the Lewis and Clark sociologist directing the Portland project. Still,
air pollution does cause, or at least contribute to, the disease.
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