Here's a few teases, to get you to read the entire article...
Since 1999, gardeners have experienced serious problems with herbicides that do not readily break down in compost. Residential lawn trimmings, hay and straw, municipal green waste, and cow and horse manure are all common compost ingredients that have become vectors for delivering unwanted chemicals, causing plant damage in home gardens.......
........Agroecologists and weed scientists are concerned about the potential misuse of these herbicides because of their relatively long persistence in the environment and potential for injury to nontargeted plants,
The language raised a warning flag to many—commercial composters, landscaping professionals, and home gardeners who depend on the municipal compost stream. In a...
Meanwhile, a class-action suit against DuPont was lodged by a Pennsylvania homeowner and an Indiana golf course claiming damages for poisoned plants. Then, in early August, as we went to .........
http://www.huffingtonpost.com/2011/09/2 ... 85742.html