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This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.

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Just 25 countries hold almost all of the world's undisturbed forests.

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More than half of that forest is in Australia, Canada, New Zealand, Russia and the U.S.

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And only 22 percent of forestland worldwide is protected.

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Those figures are from a new analysis in the journal Conservation Letters.

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So what could be done to save the 13 million plus square kilometers of untouched forests?

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After all, they're home to more than half of the world's plants and animals and provide necessities like clean air and clean water for us humans.

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But they're under serious threat, whether from logging, mining or farming.

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Such land use change is why only 3 percent of the forest that existed in the past still remains in the temperate parts of the globe.

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One suggestion for preservation is to make forests a part of international environmental negotiations, like the United Nations Framework Convention on Climate Change has tried to do.

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The goods and services forests provide should be incorporated into economic assessments as well, not just the value of their board feet of lumber.

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And the world's governments should avoid further forest losses, to slow climate change and the current rate of extinction.

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And here's another thought: forests that are owned by the communities that actually live in them tend not to be cut down.

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So local ownership could help forests survive.

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Your minute is up, for Scientific American 60-Second Earth. I'm David Biello.

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