Environmentally Friendly Chemicals
When choosing chemicals for normal household uses, look for environmentally friendly products. 
When use of strong and potentially hazardous chemicals is necessary, be sure to dispose of any excess at a Household Hazardous Waste Collection event. Do not dispose of these chemicals down the drain.
For more information go to: http://chemung.cce.cornell.edu/environment/recycling-waste-management/household-hazardous-waste-collection-event