Over the past 40 years, air quality has gotten substantially worse in many of the major cities of North America.
Answer the following statement true (T) or false (F)
False
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Summer sea ice in the Arctic Ocean may be gone by 2050.
Answer the following statement true (T) or false (F)
Bottle bills ____.
A. tax consumers who don't carry reusable containers B. require a deposit for every bottle purchased, and refund the deposit when the bottle is returned C. have been adopted in over 25 states D. discourage theft E. tax bottle manufacturers
The concentration of carbon dioxide in surface water is low, whereas the concentration of oxygen is high because of the ________.
A. exchange of gases between the atmosphere and the ocean B. conversion of carbon dioxide to bicarbonate C. difference in solubility of the gases D. respiration of plants and animals E. photosynthesis process
Overproduction of organic matter resulting in anoxic conditions is attributed to ________
A) autotrophication B) eutrophication C) net primary productivity D) photoperiodicity E) phototropism