Using an electric clothes dryer apparently consumes 10-15% of household energy. So why not switch (when possible) to the most retro of drying machines: A clothes line. I actually picked up an old clothesline last year at a tag sale. If you want more instant (and non-rusty) gratification, I’ve also found a terrific website to find all makes and models of clotheslines and clothes drying accessories, for use both indoors and outdoors: Project Laundry List. The group that runs the site is a non-profit, and it’s hosting “National Hanging Out Day” on Sunday. So have a great and green time — hanging out!