Two-year-old Sumaiya Ansari, a resident of India's Byrnihat town which is ranked the world's most polluted metropolitan area by Swiss Group IQAir, was battling breathing problems for several days before she was hospitalised in March and given oxygen.

Earth Day is observed in over 190 countries, making it one of the largest secular observances in the world.

Delhi AQI Update: The Central Pollution Control Board (CPCB) data showed that the national capital's air quality was in the moderate category.

The electrification of Caltrain in the San Francisco Bay Area has led to a significant reduction in toxic black carbon, improving air quality for commuters and residents. The study found an average reduction of 89% in riders' exposure to black carbon

India's air quality is far short of WHO standards and more than 40 per cent of its population still relies on biomass fuels, leading to deaths every year, an official from the United Nations body has said.

Let's explore how air pollution is harming your brain and what symptoms or consequences to watch out for.

Delhi will soon implement a policy banning fuel for petrol vehicles older than 15 years and 10 years for diesel vehicles.

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