It seems that Toyota had launched its first hybrid vehicle in 1997. It was a Coaster Hybrid EV minibus and after that the floodgates opened up. Toyota then launched the first generation Prius which was so popular among a lot of Hollywood stars so that they look like they're going green and to date, the Prius has consistently topped the car sales charts in Japan (partly due to the tax breaks given and partly due to increased consumer awareness over there). Of course Toyota also produces various other hybrid passenger cars like the Lexus LS600h and also Camry hybrids. But of course, the Prius is the darling of Toyota's hybrid movement.
Anyway, the fact is that Toyota claims that their hybrids to date has helped offset 4,000,000 tons of CO2 emissions in Japan and another 15,000,000 tons worldwide. Each hybrid offset is compared to a car of similar class and size i.e a Lexus hybrid against a fully petrol powered Lexus, a Prius against a Corolla and so on. Of course, it would also depend on how the hybrid is driven. If it were driven by Lead Foot Larry, it may not help the environment as much as Toyota envisages. But it would still help a little due to tech like energy recuperating brake system that is used in these sort of cars.
It is because of this sort of statistics that Toyota intends to sell about 1,000,000 hybrids a year. This will help it reach manufacturer emissions control regulations that is actually much more important to their (or any other manufacturer’s) survival in the eco-awareness times we live in.
On another note, if you drive a Prius and think that the car isn't macho enough for you then Japanese tuners Wald have come up with a body/aero kit for the Prius, but no engine tuning on the 1.5-litre petrol or the electric motor. The usual sideskirts, spoilers (which may help aerodynamic efficiency and boost economy) and large rims/tires (which may decrease efficiency by adding rolling resistance and drag – you can't win ‘em all) help make this eco-warrior slightly more warrior-like instead of a 'pious', nerdy looking car. You still can look good while trying to save the world if you know what I mean.
Oh yeah, at least Wald didn't call this a WALD Black Bison Prius like the Mercedes Benz S-class they tuned. It would be utterly pointless if they did.