The most effective technology developed so far to produce solar energy concentrated enough to run an industrial furnace or turbine is to use
A. Cogeneration
B. Smart meters
C. Photovoltaic cells
D. Parabolic mirrors
E. Passive heat absorption
Answer: D
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Which is the most inclusive organization (has most members) and has as a primary goal the maintenance of international peace and security?
A) OPEC B) United Nations C) Organization of Economic Cooperation and Development D) North Atlantic Treaty Organization E) NAFTA
In association with other natural factors, the Milankovitch cycles explain the advance and retreat of glaciers according to which of the following time periods?
A. hundreds of millions of years B. several million years C. ten thousand years to one hundred thousand years D. hundreds of thousands of years
In addition to being colder, glacial climates tend to be rather humid and moist
a. True b. False
This figure best depicts ________
A) the energy implications of increasing energy for ecosystem utilization B) nutrient cycling in an ecosystem C) the consequences of decomposers in an ecosystem D) the energy cycling consequences of the 10% law E) the energy implications of the 10% law