Toyota knows a thing or two about building hybrids — the automaker has sold more than a million of its benchmark Prius sedans worldwide. Things aren’t quite so easy now in the hybrid marketplace, however, with others joining the green movement, so the bosses decided it would be prudent to make a good thing better. Ta-dah, we now have the third generation of the car that really got this whole green shift rolling. First Drive: 2010 Toyota Prius