Big B observed Earth Hour

Megastar Amitabh Bachchan is all for saving planet earth. He turned off the lights for an hour as part of the global environment campaign.

"Had put the lights off at 8:30 p.m. till 9:30 pm for Earth Day, environment campaign last night (March 29) at home ... did you?" he tweeted Sunday.

As part of their commitment to the planet, people are asked to switch off the lights for an hour on Earth Hour, held every year in March.