Recent studies show that many of the world's savannas, including famed southern African landscapes, are experiencing significant change as rising levels of carbon dioxide in the atmosphere favor the growth of trees over grasslands.
Chevrolet is buying up emissions credits linked to 11,000 acres of grasslands in North Dakota. In exchange for payments from Chevrolet, the ranchers who own the land agree not to till their properties, reducing carbon emissions. "The amount of carbon dioxide removed from our atmosphere by Chevrolet's purchase of these credits equals the amount that would be reduced by taking more than 5,000 cars off the road," said Agriculture Secretary Tom Vilsack.