Delhi resident hides ?500 notes across city, challenges people to a treasure hunt

Delhi Is the ‘Most Polluted’ , Capital City in the World. The capital of India was found to be the world's most polluted capital city in 2023, according to air-quality monitoring group IQAir. India was also ranked as the third-most polluted country after Bangladesh and Pakistan, BBC reports. In 2022, India was the eighth most polluted country. . According to the report, the average level of fine particulate matter PM2.5 in India's air was 54.4 micrograms per cubic meter. . Delhi's air quality had a PM2.5 reading of 92.7 micrograms per cubic meter. Air that is considered safe to breathe typically has 12 to 15 micrograms per cubic meter of PM2.5, BBC reports. . Levels higher than 35 micrograms per cubic meter are thought to be unhealthy. . Only seven countries were within the World Health Organization's yearly PM2.5 guideline, an "average of 5 micrograms per cubic meter or less," BBC reports. . Those countries are Australia, Estonia, Finland, Grenada, Iceland, Mauritius and New Zealand. Those countries are Australia, Estonia, Finland, Grenada, Iceland, Mauritius and New Zealand. In 2023 air pollution remained a global health catastrophe, IQAir’s global data set provides an important reminder of the resulting injustices and the need to implement the many solutions that exist to this problem. , Aidan Farrow, senior air quality scientist at Greenpeace International, via 'The Guardian'