These high-latitude, periglacial soils contain about half of the pool of global carbon
A) Gelisols B) Spodosols C) Oxisols D) Mollisols
A
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Which of the following statements is false?
a. Heat lowers dissolved oxygen in streams and rivers. b. Organic wastes that can be decomposed by aerobic bacteria reduce the amount of oxygen in the water supply. c. Toxic chemicals released from industries can result in fish kills. d. Inorganic nutrients such as fertilizers have no adverse effects on aquatic ecosystems. e. Sediment can cloud water and reduce photosynthesis.
After the Soviet Union ended, health care in Russia deteriorated, and life expectancy for Russian men and women dropped
Indicate whether the statement is true or false
A major asteroid impact could easily cause
A) global fires. B) ozone loss. C) extended darkness. D) acid rain. E) all of the above
What agricultural practice represents the first wave in the global commodification of agriculture?
A) swidden B) pastoralism C) horticulture D) plantations E) dairies