The Toyota Prius is a full hybrid electric mid-size hatchback, formerly a compact sedan developed and manufactured by Toyota. The EPA and California Air Resources Board rate the Prius as among the cleanest vehicles sold in the United States based on smog-forming emissions.
The Prius first went on sale in Japan in 1997, and was available at all four Toyota Japan dealerships, making it the first mass-produced hybrid vehicle. It was subsequently introduced worldwide in 2000. The Prius is sold in almost 80 countries and regions, with its largest markets being those of Japan and the United States. Global cumulative Prius sales reached the milestone 1 million vehicle mark in May 2008, 2 million in September 2010, and passed the 3 million mark in June 2013. Cumulative sales of 1 million Prii were achieved in the U.S. by early April 2011, and Japan reached the 1 million mark in August 2011.