The warmest temperature ever recorded on Antarctica was 3 degrees F.
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Every year, Alaska has about 5,000 earthquakes.
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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.
14
There are more than 50,000 earthquakes throughout the world every year!
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Mexico City is built on top of an underground resevoir!
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