Sorry if this is a bit off topic but I found this interesting:
http://www.philly.com/mld/philly/14720097.htm
Here's the text of the article:
Pa. asks out-of-state campers not to bring wood
<!-- begin body-content --> HARRISBURG - Seeking to avoid an invasion of beetles that have wreaked havoc in Michigan, Ohio, Indiana and Ontario forests, natural resources officials are asking out-of-state campers who visit Pennsylvania campgrounds to leave their firewood at home.
"We want campers to obtain firewood locally and not transport it into our state parks and forest lands," Department of Conservation and Natural Resources Secretary Michael DiBerardinis said.
Officials fear that wood brought in from other states could be harboring the small metallic green bug called the emerald ash borer, which feeds on tissues under the bark of ash trees. In Michigan, where the Asian import was first discovered in 2002, the bugs have destroyed more than 10 million trees.
Other states have already cracked down on campers hauling wood into parks. Indiana officials seize and burn firewood from infected areas, and Wisconsin and South Dakota ban out-of-state firewood outright. For now, Pennsylvania officials are asking people not to bring firewood into the state, and those who do so are asked to burn it quickly. -