I live out in the sticks surrounded by farmers, swamps, and ponds. We don't seem to be having any of the problems you're talking about. Our farmers use lots of chemicals to help grow the food we eat and make an honest living for their families. Yet, those chemicals don't seem to be bothering our ponds. In fact, a buddy and I caught a nice mess of bass out of a local farm pond this afternoon, and they fried up right nice. I don't think the farmers are to blame. They live off the land, so they care about protecting it more than most folks, and have the knowledge to do so. Maybe the pretty lawn folks are messing up your neighborhood ponds with their overuse or uneducated use of chemicals, but our farmer are doing a pretty good job of growing your food while protecting our local ecosystem.