New method of estimating biodiversity based on tree cover

Historically, conservationists have protected species by placing large swaths of land into preserves and parks. However, only 13 percent of the world's land area is located in protected natural land. Most of the planet's ...

What is a forest? NASA/USGS mission helps answer the question

Examining eight different satellite-derived maps of global forest cover, a team of scientists from NASA and other institutions noticed striking differences. The forested area on the maps differed by as much as 6 percent of ...

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