Pearl, my beloved labradoodle, dutifully watched me build myself a new house for the past three years. So when I was almost finished, I decided to build her a place of her own. A standard model just wouldn’t do, though, so I went a little overboard. After creating the design with CAD software, I added a solar hot-water radiant-heating system and made a green roof that retains rainwater, creates oxygen, and improves insulation.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.