Lecture 4 - Environmental Health The World at Large...

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Environmental Health The World at Large
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Overpopulation Present 6.4 billion 2050 9.4 billion India and China have largest populations US population is less than 300 million The problem lies in the number of resources
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Air Pollution Sulfur Dioxide-yellowish brown gas produced by fossil fuels Aggravates heart and lung disease, increases respiratory disease Toxic to plants, corrosion of metal
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Particulates Nongaseous air pollutants Sources include industrial processes and internal combustion engines Irritate Lungs and can carry carcinogens
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Carbon Monoxide CO An odorless, colorless gas Primary Source from motor vehicle emissions Decreases ability of blood to carry and absorb oxygen Impairs thinking, slows reflexes, causes drowsiness, and death
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Ozone O3 A gas formed when nitrogen dioxide interacts with hydrogen chloride Irritates respiratory system, causing coughing and choking Reduce immune system Corrodes rubber and paint
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Nitrogen Dioxide High concentrations are fatal Coal-powered electrical utility and motor vehicles Precursor of ozone and acid rain
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Lead Sources: paint, batteries, drinking water,
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Lecture 4 - Environmental Health The World at Large...

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