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Ch. 4Lesson 4
Ch. 4 Lesson 4
How do people disturb the balance?
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ways peopleaffect
environment
clear prairies to
plant cropsor
build roads
automobiles factories
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People clear prairies to plant crops.
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lichens• sensitive to air pollution• good indicators of air quality
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hazardous waste• substance
that is very harmful to humans & other organisms
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OIL
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giant earthmovingequipment is
usedto dig a huge
pit
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reclaiming• mining companies must replace rock and soil that were removed
Built on a reclaimed surface mine, Hazard ARH Regional Medical Center is one of many developments that have made use of land leveled by mining.
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National Parks
preserve:
nature’s beauty
historic sights
habitats of plants &animals
1st Nat. Park= Yellowstone
National Park
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Yellowstone National Park
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Yellowstone National Park
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Yellowstone National Park
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Saguaro National Park
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Saguaro National Park
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Okefenokee National Park
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Okefenokee National Park
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Everglades National Park
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Everglades National Park