The use of hydrogen gas would eliminate most of the air pollution problems we have today because:
a. When it burns it combines with carbon dioxide and removes it from the air.
b. When it burns it combines with water to produce heavy rainwater.
c. When it burns it combines with oxygen gas in the air to produce water vapor.
d. When it burns it combines with carbon to produce methane gas.
e. More than one of the answers is correct.
C
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How are natural levees formed?
A) Bedload rises up over river banks during high floods. B) Suspended load is deposited when the river covers the floodplain. C) Minerals precipitate at the sides of rivers when the water is at bankfull level. D) Cementing action occurs at the sides of streams as a result of the high velocity of the water.
What is the most important factor controlling the seasonal distribution of precipitation in the Aw (Tropical Wet and Dry) realm?
A) proximity to maritime tropical air masses B) the location of mountain ranges C) migration of the ITCZ D) the location of ocean currents E) movement of cyclonic storms
The strike-slip San Andreas Fault in California is a ________ fault more than 1,300 km long.
A. thrust B. left-lateral C. normal D. right-lateral
A coordinate system can be used to describe a(n) _______________ location
Fill in the blank(s) with correct word