Amazon carbon sink threatened by drought

The Amazon is surprisingly sensitive to drought, according to new research conducted throughout the world's largest tropical forest. The 30-year study, published today in Science, provides the first solid evidence that drought ...

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 ...

Palm trees most abundant in American rainforests

Characteristics of palm trees differ from those of other tropical trees in many ways. In a major new study led by scientists at Uppsala University, Sweden, and University of Campinas, Brazil, they have surveyed the actual ...

Iran, Iraq pay $1.2 bn to battle sandstorms

A top Iranian environment official said on Monday Tehran and Baghdad will jointly pay $1.2 billion in a project to reduce the number of sand dunes in a bid to cut the number of sandstorms from Iraq.

Global warming—worrying lessons from the past

Fifty-six million years ago, the Earth experienced an exceptional episode of global warming. In a very short time on a geological scale, within 10 to 20,000 years, the average temperature increased by five to eight degrees, ...

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