Most of us know throwing away leftover paint, chemical cleaners and prescription medicines isn't just bad for the environment, but it's illegal, too. Those items are called "household hazardous waste," and they need to be properly disposed of. But did you know that common household items like hair dye, nail polish remover, nail polish and even batteries are also considered hazardous waste? If these items end up in the trash or down the drain, they can interact with other chemicals and create deadly gasses and explosions. Your community has designated hazardous waste collection days where you can drop off these items. They are properly contained and disposed of, so save your waste for those special collection days.