Which of the following is capable of converting solid or aqueous nitrogen found in soil, to nitrogen gas in the atmosphere, and vice versa?
A. bacteria
B. volcanic activity
C. plants
D. lightning
Answer: A
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Why can seawater hold many times more carbon dioxide than either nitrogen or oxygen at saturation?
a. Carbon dioxide is not used in photosynthesis. b. Carbon dioxide is used in mineral formation. c. Carbon dioxide combines chemically with water to form carbonic acid. d. Carbon dioxide is more reactive. e. Carbon dioxide is used by plankton for energy
During the 1950s land ownership was abolished and collectives were established to be followed by the creation of People's Communes in China. The result:
A) Increased productivity led to export surpluses. B) Land dedicated to vegetables and fruits, much of it converted from grain fields, increased 393 percent. C) The per capita consumption of meat in China increased from 12 pounds to 62 pounds. D) The deaths of some 14–26 million people from famine-related illness and starvation occurred.
The total and per capita ecological footprints of China and the United States are roughly equivalent.
Answer the following statement true (T) or false (F)
Which is not a greenhouse gas?
A. Radon B. Nitrous oxide C. Carbon dioxide D. Methane