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Recycling materials generally uses more energy than producing them from raw resources.

Scenario: A city adopts electric public transportation. What is a direct environmental benefit?

Climate change can influence the frequency and intensity of natural disasters.

Which of the following causes thermal pollution?

Which of the following best describes ozone in the stratosphere?

Scenario: A community installs rain gardens and permeable pavement to reduce stormwater runoff. What is the main goal of these changes?

Scenario: A virus spreads rapidly between cities due to international travel.  What factor most directly contributes to its rapid spread?

Scenario: Habitat loss increases competition among species. What is the most likely result? 

Coral reefs are more likely to survive in polluted and warm water conditions.

Which economic concept refers to costs not included in the price of a product?