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.