<span>The steppes of southern Russia, the African veldt and the pampas of Argentina are good examples of grassland biomes.</span>
The Apennines cover all of peninsular Italy
The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Normal warming is mostly caused by natural gases.
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Popular sovereignty is when the government gets its power from the people.
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