Aerosols of sulfur compounds affect climate in what way?
A) They have no effect on climate.
B) They destroy the ozone layer.
C) They absorb sunlight and cause the Earth's surface to warm.
D) They have different effects depending on their source.
E) They reflect sunlight and cool the Earth's surface.
E
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Explain why and how Europe has been so successful in reducing its CO2 emissions over the last 20 years
What will be an ideal response?
The diagram below is most likely from
A) humid environment because of the abundant organic matter and evidence of oxidation.
B) dry environment because of the visible lack of soil erosion.
C) a waterlogged environment because there is strong evidence of anaerobic conditions.
D) a temperate environment because of the well-developed horizons.
More-developed countries ____.
A. have a lower than average income B. use mostly renewable resources C. rely entirely on nonrenewable resources D. comprise 17% of the world's population E. provide fewer recycling services
The three crops that provide the majority of humanity's nutrients and calories are
A. cassava, corn, and rice. B. corn, soybeans, and barley. C. wheat, rice, and corn. D. corn, beans, and potatoes.