Turning waste into energy in India
Drive through northern India in winter and you'll find a landscape shrouded in smoke. The haze, which at times is so thick it can be seen from space, is the by-product of the widespread burning of crop leftovers across India's sprawling farm belt.
But the smoke is more than an eyesore – it's also hazardous. During the burning season, the air pollution in Delhi, India's capital, is 14 times the safe limit.