4 - chlorofluorocarbons (CFCs), carbon dioxide, methane,...

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4) Acid Rain Acid rain – the mixture of precipitation with air pollutants, such as sulfur dioxide and nitrogen oxide • Acidic precipitation destroys plant and animal life and ends up contaminating water systems. • In the U.S., western states have polluted eastern states via acid rain. 5) Destruction of Rain Forests • Now less that 7% of the Earth’s surface (2 billion acres), yet this small portion is home to half the world’s plant and animal species • Only half of all rain forests are left • 65,000 square miles are lost each year; a plot of land the size of a football field is destroyed every second of every day • Global warming is just one of the consequences 5) Global Warming • The greenhouse effect refers to the collection of increasing amounts of
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Unformatted text preview: chlorofluorocarbons (CFCs), carbon dioxide, methane, and other gases in the atmosphere, where they act like the glass in a greenhouse, holding heat from the sun close to the earth and preventing the heat from rising back into space. Evidence for the greenhouse effect lies in the increasing temperatures recorded around the world. Heat and drought caused by the greenhouse effect has at least three negative consequences: 1) it threatens crops and food supplies; 2) it accelerates the extinction of numerous plant and animal species; and 3) it threatens to melt polar ice caps and other glaciers, resulting in a rise in sea level (and the flooding of many countries, such as Egypt and Bangladesh)....
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