Lawn Care Without Toxic Chemicals For Homeowners What you use and do in your yard can end up outside your yard -- in your neighbor's yard, in the storm drain or stream, in drinking water and the food chain. If you multiply what you do in your yard by the number of people in your block, in your town, in your county or state, the yard starts to look like everybody's business. The environment really begins with you and your yard. The Joint Princeton Environmental Commission and the Princeton Regional Health Commission urge residents to learn how to maintain healthy lawns without use of toxic chemicals for greater protection to all, especially children, pets and birds. Click here for some recommendations.