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Lead-(Pb) automotive sources were the major contributor
of Pb emissions to the atmosphere. As a result of EPA's regulatory
efforts to reduce the content of Pb in gasoline, the contribution
from the transportation sector has significantly declined over the
past decade. Today, metals processing is the major source of Pb
emissions to the atmosphere. Exposures to Pb occurs mainly through
inhalation of air and ingestion of Pb in food, water, soil, or dust.
It accumulates n the blood, bones, and soft tissue. Lead can adversely
affect the kidneys, liver, nervous system, and other organs particularly
in children. Recent studies also show that Pb may be a factor in
high blood pressure and subsequent heart disease.
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