Non-toxic pest management tools are those methods, products and techniques that do not put human health and the environment at risk. Simple changes in your environment can significantly reduce pest populations. Before reaching for a pesticide, monitor the pest population, make structural repairs, use proper sanitation inside and outside, and modify the pests' habitat. Any openings that pests are using to access the structure should be caulked, screened or repaired. Some outdoor pests are attracted to spilled greasy or sugary liquids, improperly stored garbage, untended pet foods or explosions of naturally-occurring food sources like aphids or scale infestations on nearby plants. Efforts to eliminate food sources may eliminate pest problems.