Last week attempts at cloud seeding to reduce pollution in Delhi failed to produce any rain. We catch up with reporter Chhavi Sachdev to find out more about official’s latest and controversial attempt ...

Only one side of a silver crystal has the right structure to trigger ice formation, revealing how these particles help clouds ...

Diwali, Aiims issues a public health advisory on how to stay safe from toxic air, with practical tips on masks, air purifiers, and indoor routines.