Quote:
Lead author Lewis Ziska, an ecologist in the U.S. Department of Agriculture's office on crop systems and global change in Beltsville, Md., grew poison ivy in chambers under conditions that matched CO-2 levels as they were in 1950, about 300 parts per million (ppm), and as they are today, about 400 ppm. "Even with the small change (in CO-2 level) that has already occurred, poison ivy was able to double in size," he says.
Weed Science Poison Ivy Abstract
Weed Science Dandelion Abstract
Duke University Research
And dandelions too! I can't wait to have 50' tall weeds in my backyard so I can climb up to the top and ride on one of the seedpods a la 'A Bug's Life'. Didn't that do that in 'Honey I shrunk the kids' too? It's only a matter of time before we all cower in fear of our super-plant overlords.