Energy Conservation.
It's true! In the cold, you can put on more and more clothes until you can't move, but you can only take off so many before you are thrown in jail! The judge usually won't be sympathetic to cries of conservation, but they might laugh about it a bit!
I live in downtown Savannah, Georgia, a city known for steamy heat & humidity. The city has so many trees planted along the streets and the squares are full of vegitation too. It really helps keep downtown much cooler than the concrete sea of the 'burbs. I am finishing my MFA degree in Historic Preservation and my topic is Learning Sustainability from History. I have learned that many old buildings were designed with energy efficiency as a high priority BEFORE WWII! Artificial lights make heat, so use natural light and big windows. Transom windows over doors allow natural light to come into center hallways, not enough to read by, but enough to navagate down the hall. Open transoms also help balence out an imperfect HVAC system. I also restore antique fans, and you really can't beat a classic Vornado, GE, Emerson, Westinghouse, or R&M. They move more air with less noise than anything new, I just have to be mindful not to shove my arm into the blades. Remember that in the early days of electricity, it was very expensive to run an electric device. Old appliances, like refrigerators, were VERY energy efficient by modern standards, but they were also smaller. People did not refrigerate as much as they do now. Perhaps by using our appliances wisely and not going overboard on capacity, we can conserve without having to replace anything.
Just my 2 cents and a rant, I hope I didn't offend or stray off topic,
Dave