Large-scale fertilization of the ocean to stimulate blooms and draw down carbon have been proposed using ________.
A. iron
B. urea
C. phosphorus
D. All of these choices are correct.
E. None of these choices is correct.
Answer: D
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Which of the following is an assumption of ecological economists?
A. Resources are limited and we should not waste them. B. Pollution control and economic growth are not interrelated. C. The potential for economic growth is essentially unlimited. D. Current economic models should be fine-tuned to help offset environmental damage. E. Government should bear full responsibility for environmental damage through subsidies.
Most yard waste is
A. disposed of in landfills. B. burned. C. eliminated by source reduction. D. composted.
Bioremediation has been particularly effective in marine ecosystems in the clean-up of ________
A) heavy metals B) hydrocarbons C) nitrates D) pesticides E) thermal effluents
Diseases usually develop in response to ________ factors.
A. Nutritional and diet B. Psychological stress C. Infectious or toxic D. Physical E. All of these are correct