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UNIT 3 — MILESTONE 3
1
Select the FALSE statement about the benefits and impacts of dams from those listed below.
A dam can provide hydroelectric power, which is environmentally safer than burning fossil fuels.
A dam can provide a means of irrigation to a region with poor or unpredictable rainfall.
A dam can create new ecosystems, which increase biodiversity.
A dam can provide a dependable water supply for urban or industrial use.
CONCEPT
Water Supply
2
Which of the following is true about the ecological footprints of the U.S. and developing countries?
The U.S. standard of living requires five hectares of land per person, but a developing nation’s standard of living requires 0.5 hectares
of land per person.
The U.S. standard of living requires 10 hectares of land per person, but a developing nation’s standard of living requires one hectare of
land per person.
The U.S. standard of living requires two hectares of land per person, but a developing nation’s standard of living requires 0.2 hectares
of land per person.
The U.S. standard of living requires 15 hectares of land per person, but a developing nation’s standard of living requires 10 hectares of
land per person.
CONCEPT
Human Population Growth
3
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Which of the following is currently decreasing because of human population growth and its associated impacts?
Levels of biodiversity
Temperature of the earth’s surface
Overexploitation of fish populations
Flooding and drought
CONCEPT
Population Growth Solutions
4
Lillian always locks the cupboard in which she keeps the chemicals for the swimming pool. She has a curious four-year-old and she knows he
wouldn't recognize the pretty colored vials as poison. One day, the pool maintenance person returned to his truck for a moment, and Lillian
saw her dog sniffing at the open cupboard. Quickly, Lillian called the dog to her side and she scolded the maintenance person for leaving the
open cupboard unattended.
Lillian is most concerned about the which of the following factors of the chemicals inside?
Toxicity
Corrosivity
Reactivity
Ignitability
CONCEPT
Hazardous Waste
5
Which statement about efforts to address water pollution in the United States is true?
Earth Day was originally established with a sole focus on protecting waterways.
The state with the most polluted bodies of water has been greatly improved.
The Clean Water Act protected water sources but did not address the discharge of pollutants.
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