Billionaire philanthropist Bill Gates he called India, to play a central role in the fight against climate change, and praised the South Asian nation's leadership in renewables energy. At the fifth Ramnath Goenka Lecture organized by The Indian Express, Mr. Gates expressed concern over climate crisis and called for scientific innovation to solve this problem. A billionaire who invested more than 2 billion dollars into climate technologies, he said that finding solutions that are cheap and reliable to solve the climate crisis is a big challenge.