http://www.kqed.org/.stream/anon/radio/quest/2009/07/2009-07-06-quest.mp3
It's that time of year again. Temperatures are hot, so we're cranking up the air conditioning. That means more electricity from the power grid, more greenhouse gas emissions, more global warming and -- with warmer temperatures -- even more air conditioning! There are a few ways to halt this vicious cycle, one of which starts with a makeover for the machine itself.