High CO2 Levels Lead to Bumper Poison Ivy Crop

Written by Pat's Papers | Tuesday, 31 August 2010 9:59 AM

The Washington Post poses an interesting theory in this morning’s paper: heightened levels of carbon dioxide in the air have led to an increase in poison ivy. Writer Laura Hambleton started to investigate the possibility after both she and her son had a run-in with the itchy weed. She tracked down a climate scientist who explained that vines thrive in the presence of CO2 because it intensifies their rate of photosynthesis. CO2 levels have increased 22 percent over the last 50 years. That means, unfortunately, that as levels continue to rise, poison ivy will likely become much more of a menace.

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