The use of biomass for cooking and heating is an important source of energy in many less developed countries. Which of the following is an issue related to this use of biomass?
A. It contributes to air pollution.
B. It contributes to climate change.
C. It uses up oxygen.
D. All of the statements are correct.
Answer: A
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In the demographic transition model, birth and death rates are high during
a. the preindustrial stage b. the industrial stage c. the postindustrial stage d. the transitional stage e. the preindustrial stage and the transitional stage
Sprawl is the
A) change in density within an urban area from the periphery to the center. B) development of new housing sites not contiguous to the existing built-up area. C) land maintained as open space surrounding an urban area. D) period in the morning and evening with the heaviest volumes of traffic. E) increasing population density in rings two and three of the concentric zone model.
If the load exceeds a stream's capacity, sediment accumulates in the bed in a process called
A) saltation. B) aggradation. C) degradation. D) downcutting.
Outwash sediments are stratified by wind deposition
Indicate whether this statement is true or false.