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Study concludes forests are decreasing, but how good is the data?

Using data from 541 randomly selected 18.5 by 18.5 km blocks, an analysis of Landsat-7 satellite data has concluded that 3% of the forests (1 million square kilometer) present in 2000 were gone by 2005. See map at http://www.sciencenews.org/view/download/id/58673/name/WHEN_A_TREE_FALLS . The researchers...

Could humans have been influencing climate as long as 15 thousand years ago?

When someone mentions "climate change" and people, most of us think about the start of the industrial revolution. Those with a more anthropological viewpoint will think about the advent of slash-and-burn agriculture some 8 thousand years ago. Now, some serious researchers have had some fun...