“Profound” plant water cycle changes add new wildcard to climate change .

Science a Gogo: Botanists from Indiana University (IU) and Utrecht University (Netherlands) have discovered that rising carbon dioxide levels over the last 150 years have reduced the density of the pores (known as stomata) that plants use to breathe by 34 percent, dramatically lowering the amount of water vapor the plants release to the atmosphere. Writing about their findings in the Proceedings of the National Academy of Science, the researchers hypothesize that continually increasing CO2 levels could reduce plant......

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