"All hybrids are not created equal. Going from a conventional Toyota Matrix to a Prius reduces global…"

“All hybrids are not created equal. Going from a conventional Toyota Matrix to a Prius reduces global warming emissions a whopping 44 percent. That’s like trading in a Hummer H3 for a Mini Cooper. By contrast, going from a Saturn Aura to an Aura Hybrid only reduces emissions 10 percent, the equivalent of trading in the Hummer H3 for a 3.7-liter Jeep Grand Cherokee.”

– Hybrid Scorecard — Findings: Advice for Consumers, Lessons for Automakers