Kangana Ranaut is throwing her weight behind Cauvery Calling, the campaign launched by Sadhguru Jaggi Vasudev's Isha Foundation to revitalise the river. Envisioned as a 12-year programme, it aims to plant 242 crore trees to increase green cover around the river, thereby increasing water retention in the basin. "The rivers that are our lifeline are ceasing to exist," emphasises Ranaut, adding that environmental issues are a pressing problem the world over. "The drought in Chennai became a global issue. Leonardo Di Caprio was concerned about it even though he is in the US. Don't you think I will die of shame if I have no concern about what is happening in my country?"