The enforcement of the international convention for the prevention of pollution from ships (the origin of the U.S. Marine Plastic Pollution and Control Act of 1987) in international waters is implemented by ________.
A. the European Union
B. the United States
C. the G-8
D. the United Nations
E. nobody
Answer: E
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In using control by natural enemies of pests, from the ecological perspective it is best to
A) import enemies from abroad or from distant ecosystems to have the highest kill rate. B) select enemies that have a very broad range of pest prey or hosts. C) couple this method with intensive broad-spectrum pesticide spraying. D) select enemies that are local and have a narrow specificity for the pest in question.
the value of the environmental lapse rate is ________ C degrees per kilometer.
3.5 4.5 5.5 6.5
The natural environment and the unique heritage and culture of the people make Bhutan an attractive destination for world travelers.
a. true b. false
What is the principle of cross-cutting relationships? What will be an ideal response?