Toyota has announced today that worldwide cumulative sales of the Toyota Prius have passed the 1 million mark, with approximately 1,028,000 units sold as of the end of April this year. The Prius was launched in Japan in 1997 and began selling in Europe, North America and other markets in 2000. In 2005, Toyota began first overseas production of the Prius in Changchun, China, and sales of Prius vehicles in South Korea are expected to begin in the latter half of 2009. Based on sales figures and a lot may complex calculations Toyota claims Prius's have led to a reduction in CO2 emissions (considered a cause of global warming) by producing approximately 4.5 million tons less CO2 when compared with gasoline-powered vehicles in the same class and of similar size and driving performance.

Via - Greenlaunches