Earth's green carbon sink [allegedly] on the wane : Nature News

Along with the oceans, plants are doing us a great service by taking up about half of all fossil-fuel carbon dioxide emissions from the atmosphere, says Running. "This is the first indication that it might be slipping."
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Michael Crimmins, a climatologist at the University of Arizona in Tucson, says that "this paper does a nice job" of highlighting areas of the planet where plant growth is limited by the availability of water, rather than by temperature. "I'm glad to finally see some global-scale evidence that a warmer world is not necessarily a greener world," he says.  [If you really believed this, why would it make you "glad"?]