When I was at the Sprint Advocates Group Event last September it was stated that the environmental movement within the Sprint/Nextel organization is driven by Dan Hesse personally. The eco-friendly devices are a small part of Sprint's efforts that include: alternative energy sources, environmentally friendly marketing materials, device buyback or possibly trade-in programs (goal is to recover 9 devices for every 10 devices sold by 2017), and other internal programs designed to reduce, reuse, recycle e-waste generated by Network and IT departments.