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Artificial rain to clean air

The monsoon has withdrawn from most parts of the country and there are indications of an early onset of winter over the National Capital Region. The prospect of a long cold season has triggered fears of a smoky sky over the capital. The haze usually makes its appearance in the run-up to Diwali, and continues well past the winter. The Delhi government this time has a new weapon in its armoury against pollution – it is slated to trial cloud-seeding in early October to trigger artificial rainfall. The procedure that aims to check pollution from aggravation will involve aircraft flying beneath cloud layers and dispersing silver iodide. This compound interacts with water droplets in clouds, making them heavier so they condense and fall as ra

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