There are no rivers in Saudi Arabia — all water comes from rainfall, groundwater, or desalination.
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More people live in Asia than the rest of the world combined.
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The 2019–2020 Australian bushfires burned millions of acres.
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The Earth's mantle lies between the crust and core.
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Around 90% of the world's population lives in the Northern Hemisphere.
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The Atacama Desert in Chile is so dry that some weather stations there have never recorded rain.
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The Himalayas continue to rise due to tectonic movement.
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The Great Lakes contain about 20% of the world's surface freshwater.
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The Amazon River basin covers millions of square kilometers.
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