mbentley

Here are a few links to collections of extensive studies and data from the EPA, IPEMA and other reputable sources:

http://en.wikipedia.org/wiki/Rubber_mulch

http://www.pinnaclerubbermulch.com/rubber_mulch_is_safer.html

http://www.epa.gov/nerl/features/tire_crumbs.html

http://www.epa.gov/osw/conserve/tools/cpg/products/playgrnd.htm

In short, Rubber Mulch is safe for playgrounds and landscaping use. I have used it in landscaping and love it, and my kids play on it at most of our neighborhood parks.