Tonight, we begin a special series of NDTV Dialogues on the biggest challenge facing us globally: Climate Change. What is the world we will leave to our future generations will be discussed when global leaders meet in a landmark summit in Paris. Joining me on the show, Piyush Goyal, Minister of New & Renewable Energy, Power and Coal; Ashwani Kumar, Chairman, Parliamentary Standing Committee on Environment, Forest and Climate Change and Sunita Narain, Director General, Centre for Science and Environment.