You may remember (or not, and that’s okay) that I blogged a while back about setting the thermostat lower and hoping to stargaze on March 29th, as I hope that all across America people turn off their lights for one glorious hour.

Well, people: it’s not just Lights Out America: it’s now EARTH HOUR.

Turn off your lights TOMORROW, March 29th, at EIGHT PM LOCAL TIME (no lame "I can’t do the math" excuses need apply).

Do it, because it sounds like fun– an hour in the lovely spring twilight, spent watching the last fingers of dusk spread across the sky, or indoors by candlelight.

Do it because it sounds like a good idea.

Do it because if we don’t try, how will we know if we can make a difference?