I have a two questions on the A/C in my new 2012 Prius. 1) Recirculated vs Outside Air. My question is, why would you ever set this to something other than recirculated??? Whether you're cooling or heating, it seems like it would be much more efficient to cool or heat air that's already been heated or cooled. 2) The A/C button. What exactly does this do? I've grown up thinking that "air conditioning" is synonymous with "the thing that makes air colder." If I have the temperature set to a cooler temp, but turn the A/C off, what happens? If I have the temperature set to a hotter temp, but turn the A/C on, what happens? Thanks!