Food production worldwide is now less than in previous decades
Indicate whether the statement is true or false
F
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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.
Suppose you hold your hand at arm's length and cloud elements appear to be about the size of your fist. Which of the following is the likely cloud type?
A. stratocumulus B. cirrocumulus C. cumulus humilis D. altocumulus
On the Origin of the Species was written by
a. Gregor Mendel. d. Aristotle. b. Jean-Baptiste de Lamarck. e. Charles Lyell. c. Charles Darwin.
Suppose you find a rock comprised mostly of decayed plant material. What type of rock have you found?
A. Biochemical B. Clastic C. Chemical