The greenhouse effect occurs when _____.
a. the burning of fossil fuels releases too much carbon dioxide into the air, causing the earth's climate to warm
b. the overuse of water from the Edwards and Ogallala aquifers threatens access to water in the future
c. photosynthesis in plants causes the growth of dangerous algae, threatening the life of fish and other water animals
d. overreliance on wind energy causes the average temperature to rise downwind of the wind farms
e. coal-burning plants in Mexico cause air pollution to drift into Texas
Question 2
Which of these is not a major advantage of oil as a source of energy?
a. The state and nation possesses a wealth of infrastructure (refineries, pipelines, and gas stations) that make it easy to use oil for energy needs.
b. It is relatively easy to transport (through pipelines).
c. It is relatively cheap.
d. We are dependent on it and often must rely on oil found in politically unstable regions of the world.
e. It is an important driver of the Texas economy.
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