Approximately what percentage of the earth's land surface is desert and steppe?
A) 20 percent B) 50 percent C) 40 percent D) 30 percent
D
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What is the acronym for the National Highway Traffic Safety Administration's standards that regulate fuel economy in motor vehicles?
HOP CAFE CAA COLA
Which of the following is a cause of natural climate change?
A) forest fires B) tornadoes C) volcanic eruptions D) sea levels increasing E) glacial melting
The Indian Removal Act moved thousands of Native Americans to "Indian Territory" in what eventually became the state of ________
Fill in the blank(s) with correct word
El Niño and La Niña events ________
A) both decrease water temperatures in the eastern Pacific Ocean B) occur in precise patterns every 10 years C) produce changes of opposite direction in temperature and precipitation patterns D) both increase water temperatures in the Gulf of Mexico E) both increase water temperatures in the eastern Pacific Ocean