How India’s battle with climate change could determine all of our fates

India's population and emissions are rising fast, and its ability to tackle poverty without massive fossil fuel use will decide the fate of the planet

"It's a lucky charm," says Rajesh, pointing to the solar-powered battery in his window that he has smeared with turmeric as a blessing. "It has changed our life."

He lives in Rajghat, a village on the border of Rajasthan and Madhya Pradesh states, and until very recently was one of the 240 million Indians who live without electricity. In the poverty that results, Rajghat has become a village of bachelors, with just two weddings in 20 years.