Which of the following is a disadvantage of hydropower?
a. It creates high levels of carbon dioxide emissions.
b. There is a high environmental impact from flooding land to form a reservoir.
c. The cost of electricity produced from hydropower is lower than electricity produced from other sources.
d. It has a moderate to high net energy.
e. It is largely unavailable in the United States
B
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Which of these has the greatest charge?
A. Electron. B. Proton. C. both the same D. none of the above
What happens to a river as it flows through a delta and encounters the sea?
A) The discharge and water velocity increase.
B) The maximum sediment grain size carried by the river increases.
C) The total sediment load carried by the river decreases.
D) All of these are correct.
The Grenville orogen probably resulted from closure of a(n) __________, the final stage in a Wilson cycle
Fill in the blank(s) with correct word
Over the Indian Ocean the strongest tropical storms are called
A) hurricanes. B) typhoons. C) inta'akas. D) cyclones.