I've not been a huge environmentalist, advocating for the end of SUVs, or hugging trees, but a recent study may change that:
" According to study about global warming at Cornell, "weedy vines like kudzu, honeysuckle and poison ivy could increase by as much as 70 percent with higher concentrations of carbon dioxide, the main greenhouse gas that’s driving global warming. Among the plants expected to do particularly well in an environment rich in carbon dioxide is ragweed." Need any more reasons to be concerned about global warming?"
"On the other hand, the climate change and CO2 in the air will be good for aggressive, weedy plants such as poison ivy." http://www.time.com/time/magazine/article/0,9171,1176828,00.html
so now I think I'll start a campaign to end global warming... we definintly don't want poison ivy becoming more dangerous... yuck... kill it all I say!