Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
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Mexico City is built on top of an underground resevoir!
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10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
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Australia's Great Barrier Reef is 1,250 miles long!
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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One cubic mile of seawater contains about 50 pounds of gold.
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Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
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