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PP. 435-444 22-2: ENVIRONMENTAL ISSUES
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Pollution Putting substances that cause unintended harm into the air, soil, or water
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GREENHOUSE AFFECT the ability to trap heat keeps our planet warm and habitable
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GLOBAL WARMING Excess CO 2 released from burning of fossil fuels Possible correlation between temperature and CO 2 levels Adds to the “greenhouse” to trapping heat Estimated that earth’s average temp with increase by 2 degrees in the next 100 years.
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Ocean Acidification CO 2 dissolve rate increases with increasing temperature carbon dioxide (CO 2 ) reacts with bicarbonate (H 2 CO 3 ) to produce carbonic acid (HCO−) and carbonate (CO2−) and H+ Leads to acidification
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HOLE IN THE OZONE LAYER O 3 (ozone) blocks radiation CFCs (chlorofluorocarbons) from refrigerators and propellants break down ozone Localized in southern hemisphere and increased in size over time
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ACID RAIN Burning of coal produces H 2 SO 4 (sulfuric acid) and burning of gasoline produces HNO 3 (nitric acid)
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ACID RAIN These pollutants enter the atmosphere to form acidic water (acid rain) Changing pH causes diseases or death in trees, fish, and other organisms.
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LAND AND WATER POLLUTION Bioaccumulation: pollutant from the environment enters the food chain through the lowest level Biomagnification: increase in concentration of a pollutant moving up the food chain
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ECOSYSTEM DESTRUCTION Extinction Imbalances (i.e. removing keystone species, habitat destruction)
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