What could be the most viable environmentally friendly car? I some how focused in compressed air powered cars. [more inside]
posted by curiousleo on Mar 12, 2007 - 19 answers

Why is it that when I sleep with an open window at night, I wake up way more energized? [more inside]
posted by |n$eCur3 on Feb 15, 2006 - 23 answers

Using Cold Outside Air to Reduce Refrigeration Costs: Why isn't this done? [more inside]
posted by ParisParamus on Dec 26, 2005 - 25 answers

Are Daikin mini-split air conditioners really more efficient? I live in Puerto Rico where most houses are cement and central air is pretty much out of the questions. Average temperature is 92F. [more inside]
posted by thimk on Sep 25, 2005 - 1 answer