Martin Frey wrote:

Scott Lowther wrote:


And, it appears that if you really want to make the air cleaner, break
out a chainsaw and cut down some trees:
http://www.newscientist.com/news/news.jsp?id=ns99996526
New trees cancel out air pollution cuts

Industry has dramatically cut its emissions of pollutants, called
volatile organic compounds. But those cuts have been more than offset by
the amount of VOCs churned out by trees.


Oh ****. We're all doomed. I'll read the article this evening, but it
does seem odd that trees are now turning lethal when for most of
history there have been so many more of them than there are now.


Actually, the US now has more trees than when Columbus showed up.