The Prius is the most fuel efficient gasoline car currently sold in the U.S. and California Air Resources Board (CARB) also rate the Prius as among the cleanest vehicles sold in the United States based on smog forming and toxic emissions.
By August 31, 2008, the Prius reached worldwide cumulative sales of 1.43 million units. As a top seller, the U.S. market made up more than half of the 1.2 million Prius sold worldwide by early 2009.