"Instead of getting a cake or other gift for a friend's birthday, we should gift a plant. It is horrible to know we haven't taken care of our environment… we all are responsible to provide a pollution free environment to our children. We should not only plant trees but should also adopt and nurture them so they grow and provide us cleaner air," said Amitabh Bachchan during the season 5 launch of the Banega Swachh India campaign.