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Unformatted text preview: animal tests and involve only few human probands. Epidemiological studies, based on the measurable effects on the health of people when naturally exposed to a particular pollutant. The exposure time for human experiments is usually limited because of possible damage to health. Epidemiological studies can help to evaluate chronic, long-term effects impact on health The researchers focused on health hazards posed by the most serious pollutants: PM10 and ozone. PM10 comes from various sources, including road construction and dust, diesel trucks and buses, forest fires, and the open-air burning of refuse. Both pollutants can irritate eyes, cause or aggravate respiratory and cardiovascular ailments, and lead to premature death...
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- Spring '10