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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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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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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The warmest temperature ever recorded on Antarctica was 3 degrees F.
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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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The Amazon rainforest produces more than 20% the world's oxygen supply.
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The Caspian Sea is also classed as the world's largest lake.
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