S**t happens... Get rid of all your cars and hide in your basement. Oh wait, radon gas, then hide in your attic, oh heat stroke, your bathroom them? No you'll slip in there, Ummm... Bummer, no perfect solution. Liability? I think Toyota could get sued because a car was left running even though the key was removed and also get sued from a car that shutdown on the hiway when the key accidentally fell to the floor outside the radio range. Operating a motor vehicle requires care and attention which not everyone is prepared to give all the time. The system will only be perfect once the human equation is completely removed from the system.

Two climate control systems, one inside and the other at the tailpipe.

2007 Camry Hybrid (in service June 2006)
FE: 6.67L/100km or 35.3 mpg (6.11L/100km or 38.5 mpg in summer)