India’s supreme court on Tuesday (23) allowed the use of “green” firecrackers for Diwali next month to try to curb pollution, but it was unclear how the rules will be enforced or whether there was such a thing as an environmentally safe firework. The court banned the sale of firecrackers outright during the Hindu festival of lights last year but revellers bought them from neighbouring states and air pollution in New Delhi hit 18 times the healthy limit. Each year, smoke from firecrackers covers Delhi and its satellite cities in a haze that can linger for days as wind speeds…
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