Air Quality Egg
 Air Quality Egg
A project aiming to give citizens a way to participate in the conversation about air quality. It is composed of a sensing device that measures the air quality in the immediate environment and an on-line community that is sharing this information in real-time.
It is a community-developed, open source project that is driven by people who care about the air they breathe.
More info: http://airqualityegg.wikispaces.com/