Nokia Eco Sensor

This concept isn't so much about saving the environment as it is about sensing what's going on around you. It consists of two parts: a touch-screen phone and a wearable unit that can sense and analyze your surroundings. The phone looks pretty unremarkable, but you could wear the latter as a neck or wrist strap (and you thought Bluetooth headsets were tacky). It would have solar cell, though, for powering, and near field communication (NFC) features.