The easy way - Pololu #1482
Raspberry Pi can be a good environmental monitor and can forbid you to drive if you're drunk.
Example on how to connect to and put message on RabbitMQ.
Air quality and smoke(fire) detection for urban canyons to provide early detection of brush fires caused by transients or other causes.
It is an alert system which alert you in period of gas leakage, fire and high temperature.
