The "green revolution" appeared to allow the Malthusian vision of widespread famine to be conquered forever
What will be an ideal response?
Fertilizer and irrigation, both "unnatural" in the scheme of things, have been
enlisted to increase the yield of the miracle green revolution crops. Consequences could
include depleted soils, salinization, and waterlogging. There are still limits, but they are
sustained by input of energy, so the doom of Malthus has been postponed, not eliminated.
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The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would weigh only about 3 times as much because
A) your mass is 100 times less on Jupiter. B) Jupiter is significantly farther from the Sun. C) Jupiter's radius is 10 times Earth's radius. D) you are 100 times more weightless there. E) none of the above
What different resistances can be obtained by using two 2.0-? resistors and one 4.0-? resistor? You must use all three of them in each possible combination
What will be an ideal response?
Kepler's first law of planetary motion is known as the law of ______________ paths
Fill in the blank(s) with correct word
Of the following gases, which is the most important contributor to the Earth's greenhouse effect?
a. water vapor c. CFCs b. ozone d. methane