Carbon dioxide reduction, capture and storage systems are currently
A) widely used in power plants that burn oil, natural, gas, and coal.
B) not possible with available technology.
C) costly and experimental, but promising.
D) only available for power plants that burn natural gas.
C
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Why has the Sahel been a focus of attention in recent times? What will be an ideal response?
Energy efficiency is ________
A) a measurement of overall energy use B) reducing energy wastes C) increasing demand but decreasing accessibility of various energy sources D) the amount of energy used per dollar of economic output E) the process of using less energy to obtain goods and services
Haboobs:
A) do not occur more than once or twice a year. B) are usually only a few meters high. C) are dust storms triggered by intense thunderstorms. D) never occur outside of Northern Africa.
Regional terrestrial climax communities are called eutrophic systems.
Answer the following statement true (T) or false (F)