Bamboo phone

The Bamboo's casing is made of bio-plastic made of renewable natural resources like corn, and Bamboo, which, when harvested, grows back in due time. What's more, after a year or so and you decide not to use the phone anymore, you can bury the print board, battery, and antenna in compost, which will then disintegrate, releasing bamboo seeds that would grow into new plants. The phone will also feature an energy-efficient monochrome display, and a hand-crack with which to re-charge the device. A 3-minute cranking session could provide enough power for one phone call.