Study: Poison Ivy Packing a More Powerful Punch This Summer (AP)

MADISON, Wis. (AP) — A poison-ivy rash is never any fun.

But this year the itching might be worse.

Botanists say there are record-high carbon-dioxide levels – and that’s causing poison-ivy plants to grow faster and with more potency.

Tom Sharkey is a botany professor at the University of Wisconsin-Madison.