Decluttering shouldn’t be just a matter of what and how much you throw away or otherwise dispose of. Doing it right should also mean doing it responsibly. What you add to the trash pile shouldn’t become a nuisance — or threat — to others. Fulton Schools Professor Rolf Halden, director of ASU’s Biodesign Center for Environmental Health Engineering, points out that chemicals in the containers of household products could become dangerous if they leak into soil. Batteries, for instance, contain lead and cadmium, which shouldn’t be put in the garbage. To avoid doing harm, look for websites with information about eco-friendly services that take hazardous waste such as fuels, pesticides, fluorescent lightbulbs, unused medications, batteries and even large appliances and recycles them or disposes of them safely.