Legendary actor Amitabh Bachchan, who 'just finished' observing 'Earth Hour' on Saturday, expressed his disappointment as many did not turn the lights off. The 77-year-old actor took to Twitter to write down his disappointment on how many people did not turn off their lights between 8:30 pm to 9:30 pm as a sign of solidarity, to spread awareness about sustainability and climate change.

"Earth Hour' today to shut electric lights from 8.30 to 9.30 pm .. just finished observing it , and back to you .. thought of writing here in candlelight, but best to follow instructions .. Sad though, as I looked out of my window, there were not many that observed it," the tweet reads. Earlier, son Abhishek Bachchan had taken to Instagram to share an 'Earth Hour' selfie, which saw a complete dark post.