The fireworks let off for the Hindu festival of light, Diwali, have led to heavy air pollution in India's capital. But people are also choking on exhaust fumes and industrial emissions.
Diesel generators are often dirty devices. But what if you could turn the soot they puff out into something useful? A young group of engineers in Delhi did just that. And ships are next.
In the past decade, stand-up comedy has become hugely popular in India. At the same time, comedians have come under fire for taking political swipes at the authorities. Murali Krishnan reports from New Delhi.
Taking a long walk might not seem like an obvious way to stop plastic pollution, but one woman in India is giving it a try. And she's attracting attention.
A blanket of thick smog carrying harmful particulate matter has engulfed large parts of northern India and Pakistan. Hospitals in the region are witnessing a huge spike in patients suffering from respiratory problems.
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