From Fortune, Michael Dell was quoted saying:

If we sell 40 million computers a year, and the industry is going to sell 200 million computers a year, at some point they are going to come out of circulation. Where do they all go? I want to be in a position where we are doing the right thing.

Whether or not you are buying a Dell product, you can visit the Dell website, print out a prepaid shipping label and return your Dell desktop, laptop, printer or ink cartridge, free of charge. They’ll send a service to pick the equipment up. Computers are then refurbished and donated to the National Cristina Foundation, which places them with nonprofit groups, or they can be dropped off at Goodwill, with which Dell has also established a partnership. According to the company, nothing ends up in landfills.