Ecosystem services ________
A) contribute to keeping ecosystems productive
B) are actions humans must take in order to protect and serve the environment
C) are economically valuable services provided by natural systems
D) are required to rebalance natural systems that we have disturbed
E) are valuable to natural systems but not to human-created systems
C
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Reducing packaging on manufactured goods in an example of
A. pollution cleanup B. pollution prevention. C. the tragedy of the commons. D. a tradeoff E. an end-of-the-pipe solution.
What causes the subsidence that sometimes accompanies groundwater use? What will be an ideal response?
Burning ethanol derived from sugarcane produces at least ________ less greenhouse gases than burning an equivalent amount of gasoline
A) 33-66% B) 5-15% C) 16-32% D) 97-99% E) 87-96%
A 2003 study reported that ________% of large-bodied fish and sharks were lost in the first decade of industrialized fishing
A) 10 B) 20 C) 40 D) 50 E) 90