Suppose the global community came to an agreement to reduce CO2 emissions that had the same impact as the Montreal Protocol had for CFCs. Predict how CO2 levels would change over the next several decades.
A. CO2 levels would decrease significantly
B. CO2 levels would stay about the same
C. CO2 levels would increase significantly
Answer: B
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What is the most densely settled island of Indonesia?
A) Luzon
B) Borneo
C) Bali
D) Java
E) Sumatra
In general, the farther a dairy farm is from a large urban area, the lower the percentage of output devoted to fresh milk. This occurs primarily because
A) land costs are lower farther from the urban area. B) milk is more perishable than butter. C) transport costs are greater farther from the urban area. D) the quality of soil is lower near an urban area.
Why is carbonic acid the most abundant acid in chemical weathering?
A) Carbon dioxide is present in the atmosphere and in soil; it combines with water vapor in the atmosphere and water percolating through soil to produce weak carbonic acid. B) Carbon dioxide easily breaks down to carbonic acid. C) Carbonic acid is so good at chemical weathering that it appears all the time. D) Acetic acid is rare, so carbonic acid is common.
Uncertainty in projecting probable greenhouse-effect heating arises from uncertainty about
A. projected global cloud cover as temperatures change. B. the effects of gases other than CO2. C. the relationship between CO2 produced and resultant atmospheric CO2 levels. D. All of the choices are correct.