(Image credit: Apartment Therapy )

Live in New York City? Turn your old energy hog air conditioner into ConEd at one of their events , buy a new, Energy Star qualified model, and you'll get up to $100, and that's on top of the money you won't be paying in electric bills. We think energy efficiency starts at home, and while it's nice to get money back, there are more altruistic reasons to save energy whether you're in NYC or Omaha.

To put it bluntly: blackouts kill. When too many people use too much energy and the power goes out, the elderly and infirm—especially those who are afraid to open their windows—occasionally succumb to the heat.
So swap out your AC (or just turn up the ceiling fan) and enjoy the coolth guilt-free.
Thanks to reader damova for the tip.