Overpopulation, pollution, and climate change are threatening water supplies worldwide.

One of the culprits of water pollution is fracking – short for hydraulic fracturing. It’s a process of drilling deep into shale rock and using high-pressure water and chemicals to release the gas trapped inside.

Journalist and filmmaker Melissa Troutman is from Coudersport, Pennsylvania, one of the United States’ fracking hotspots. She has been investigating pollution to the community’s water sources.

Environmentalists have long called for a switch to energy sources that don’t rely on burning fossil fuels.

Vaishali Sinha is the founder of ReNew Power, India’s largest renewable energy company.