Pesticides and chemical fertilizers kill weeds and keep your lawn green. But that’s not all these chemicals do. Did you know that… 1. While you are killing weeds and insects you’re also killing earth worms and beneficial micro organisms in your soil. 2. These weed and feed chemicals don’t just stay where they are applied. Pesticides have been found indoors in carpeting a year after they were applied outdoors. 3. In a study completed in North Carolina, 14 pesticides were found in household dust. 4. The EPA estimates that 95% of pesticides used on your lawn are possible or probable carcinogens.