Chances are, many Americans received shiny, new gadgets for the holidays — meaning their old electronics will either collect dust in a closet somewhere or get tossed out.These unwanted laptops, tablets and printers contribute to the enormous amount of electronic waste, or “e-waste,” that continually piles up in our landfills. According to the EPA, 3.4 million tons of tech gear was trashed in 2012, and unfortunately, only 12.5 percent of e-waste is currently recycled.