Today, Saturday, April 29th, at 8pm in your local timezone, people will be turning off their lights to show solidarity as we try to save this wacky planet of ours. Try it. I will. Sounds like a good time for a soak in a tub (run, of course, before 8pm) where I can read by candlelight.
Check out the Earth Hour website. And let me know here if you do it.