In addition to destroying the ozone layer, nitrous oxide from fertilizer contributes to global warming by emission of methane, a greenhouse gas
What constraints can there be on Earth's population if we assume that about half the current population is (mostly) vegetarian? How does vegetarianism affect Earth's carrying capacity?
It is possible to argue that growing crops is less disturbing to the environment
than raising animals for people to eat because grain is lower on the trophic pyramid.
However, as we see here, this can also cause problems for the environment.
Many more vegetarians can be sustained by Earth in any case than carnivores. This is a
more minor problem than living higher on the trophic pyramid.
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The composition of Earth's atmosphere today is about 78% ________, 21% ________, and about 1% ________, with trace amounts of other gases.
A. nitrogen; carbon dioxide; oxygen B. nitrogen; oxygen; argon C. nitrogen; oxygen; carbon dioxide D. oxygen; nitrogen; water vapor E. oxygen; carbon dioxide; nitrogen
It's hot as blue blazes outside so you stand in front of your refrigerator with the door open to cool off. If you stand there long enough,
A. the room will eventually get colder. B. the room will stay the same temperature. C. the room will eventually get warmer.
An astronaut sets up a pendulum on the Moon, where the acceleration due to gravity is 1/6 that of Earth. If she finds that she must push the pendulum with a frequency of 0.10 Hz to maintain a swinging motion, what is the length of the pendulum?
a. 4.1 m b. 1.6 m c. 99 m d. 7.8 m
Covalently bonded materials cannot be modeled with pair potentials, because the pair potential energy is only a function of interatomic ______________.
Fill in the blank(s) with the appropriate word(s).