As part of its carbon offset program, Chevrolet is supporting IdleAir, a project to help long-haul truckers avoid idling during rest breaks at truckstops, which will allow the idle-reduction technology to be available in more locations. IdleAir's technology maintains a comfortable cabin temperature and powers a TV, laptop or microwave without emitting the carbon dioxide emissions that come from engine idling.

The IdleAir project is one of many carbon-reduction projects Chevrolet is supporting in its goal to prevent up to 8 million metric tons of carbon dioxide from entering the earth's atmosphere. To date, it has secured commitments for nearly 7 million metric tons.

With Chevrolet's help, IdleAir can further expand availability of its engine-idling alternative. With the service, a driver pulls into an IdleAir space and installs a reusable plastic window adapter that accepts a unit connecting his or her cab to a heating and cooling air vent, TV, power outlets, internet and other conveniences. The truck engine can then be turned off, saving fuel, reducing emissions and keeping power on to the big rig's amenities.

Drivers typically rest at night, so IdleAir uses off-peak power and has begun installing solar panels on some of its overhead trusses to provide solar-powered electricity.

Chevrolet was the largest corporate buyer of voluntary carbon reduction credits in the United States by volume for 2011 as tracked by Forest Trends' Ecosystem Marketplace, a nonprofit source of environmental news and data.

Projects must be reviewed, validated and verified before the investment is completed. Actual carbon reductions take place between 2010 and 2014.