An ion that is an essential nutrient for plant growth, and which was studied by Bormann and Likens, is the ____________________ ion
Fill in the blanks with correct word
nitrate
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Which of these locations would generate the lowest recharge rate for groundwater?
A. parking lot B. meadow C. grassy park D. forest
Which of these is an issue that commonly results in an international water dispute?
A. hydroelectric facilities B. wetland mitigation C. recreational use permits D. water allocation to different countries
Which of the following cycles are biogeochemical cycles?
a. The hydrologic cycle b. The carbon cycle c. The rock cycle d. All of the above e. Both a and b
This image shows the annual per capita consumption of various economically important materials. Based on this figure, which of the following categories does the average American consume the most from every year?
A) Nonmetallic resources B) Metallic resources C) Energy resources