Trees are awesome: Study shows tree leaves can capture 50%+ of particulate matter pollution
Nature's high-tech air scrubbers
We always knew that trees are good air filters, but it's been hard to quantify just how much. One new study from Lancaster University, in the U.K., tried to do so. What they found is quite interesting, and one more reason to hug a tree today!
Read More:
http://urbanforestrynetwork.org/benefits/air%20quality.htm
Trees Reduce Air Pollution
http://www.dnr.state.md.us/forests/publications/urban2.html
EPA Trees and Air Pollution
http://www.epa.gov/ORD/sciencenews/scinews_trees-and-air-pollution.htm