On October 11 2018, a man gave up his life to save the most revered river of India - The Ganga. GD Agarwal - also known as Swami Gyan Swaroop Sanand fasted unto death with one purpose - to get the government to fulfill the multiple promises made for saving the river Ganges.

CNBC-TV18 caught up with experts to understand, why did an engineer turned environmentalist have to give up his life for a mission which the current NDA government said would be its top priority? And how do we ensure that his life is not lost in vain?