1. Which statement explains how smog forms? Sunlight and heat react
with gases in the
atmos- phere.
2. Why is urbanization contributing to pollution? People in urban areas
consume more energy,
food, and water.
3. Which best explains the effect of reforestation on land? It restores
trees to areas
where they once grew.
4. How does the construction of dams positively by preventing
affect natural resources? flooding, creating
reservoirs, and
providing water for
irriga- tion
5. Which environmental policy must consider the expen- reducing air
pollution
sive startup costs associated with building
machines that harvest energy from clean
sources?
6. Which solution would help local farms if the water level Build wind-
powered
in a reservoir used for irrigation became pumps to use groundwa-
low? ter.
7. What farming method is used in dry or desert areas? drip
irrigation
8. Which activity uses water for both fishing
recreational and industrial purposes?
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5
, Earth's Resources Complete Study Guide Test.
9. Which step of desalination must be done before water Water is
heated until it
is condensed and collected? evaporates.
10. Which three gases are released into the nitrogen, water vapor, car-
atmosphere when volcanoes erupt? bon dioxide
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5