Which term best describes the overall processes provided by healthy ecosystems that support life and human economies at no monetary cost to us?
A. Biodiversity
B. Chemical nutrient cycling
C. Sustainable principles
D. Natural resources
E. Ecosystem services
Answer: E
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This country is part of Southern Africa but is separated by water ______________________.
Fill in the blank(s) with the appropriate word(s).
If a tornado is rotating in a counterclockwise direction and moving toward the northeast, the strongest winds will be on its ____ side
A) southwestern B) southeastern C) northeastern D) northwestern
Define water pollution, point source, and nonpoint source pollution. Which of the two (point source or non-point source) is easier to identify? Which is easier to legislate? Which currently poses the greatest threat to freshwater?
What will be an ideal response?
A major asteroid impact could easily cause
A) global fires. B) ozone loss. C) extended darkness. D) acid rain. E) all of the above