Forest Fire (1 of 2) (IMAGE)
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This shows a forest fire in Canada. Large areas of Canada are apparently approaching this threshold value and may in future exceed it due to climate change. As a result both the area burnt down annually and the average size of the fires would increase, write the researchers of the Helmholtz Centre for Environmental Research (UFZ) and the University of Michigan in the December issue of the journal the American Naturalist.
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Photo: skylight/Fotolia
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