tumblinas:

Millions of people around the world are joining together to make a statement about climate change by turning their lights off for an hour. It’s called Earth Hour. Earth Hour is on March 29 from 8 – 9 p.m. local time, and it looks like it’s going to be really big. So far 25 cities around the world are taking part, including Atlanta, Chicago, Phoenix and San Francisco in the U.S.

Sign up for Earth Hour by visiting www.earthhour.org/signup

And remember – Lights Out on March 29!