1) Why do cities get hotter than the areas around them? a) Cities have more trees and plants. b) Cities have more open spaces. c) Cities have more concrete, narrow streets, and tall d) Cities have less pollution. 2) What is a benefit of using light-colored rooftops on buildings? a) They help buildings stay cooler inside. b) They help buildings stay warmer inside. c) They are cheaper to build. d) They are more attractive. 3) What is one way that vertical farms would be more sustainable than traditional farms? a) A) They would use more land. b) B) They would use less water. c) C) They would use more transportation. d) D) They would use more energy.

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