Since 1978, household appliances have gotten way better. Most notablly, heating used to account for 66 percent of our collective residential energy use. Nowadays, thanks to cleaner-burning furnaces and energy-efficient construction and window design, that number is closer to 40 percent. Not only that, the total energy devoted to heating houses has dropped by 38 percent, even though we have 45 percent more houses to heat. Hey, impressive!
Yeeeeah, but the thing is, we're now buying so many of these very-efficient appliances that we suck up as much power as we used to. In other words, we're channeling all that efficiency into better lifestyles.
Light pollution has taken away our ability to see the stars. Can we still save the night sky?