India and Pakistan dominate WHO air pollution database Air pollution

At at this time of year, Agricultural burning increases the risk of air pollution Across Northern India and Pakistan. The region is home to 16 of the World Health Organization’s 20 most polluted cities Global PM2.5 database. But are these the most polluted places ever recorded? The lack of measurement makes the historical comparison difficult, but we have some clues.

More than 200 years ago, Benjamin Franklin was one of the most famous scientists Study electricity Lightning is the most obvious manifestation of lightning in the atmosphere, but air pollution also changes the electrical properties of our air.

Measurement of electricity near Hyde Park In about 1790, it was suggested that in the 18th century, London’s particulate matter was half the annual average of the most polluted cities in modern India.

By 1900, conditions had deteriorated. Measurement of atmospheric electricity at the cue show The air pollution on the shores of London was similar to that of the worst Indian cities Today

When The first routine measurement of particulate matter In the 1920s, central London nearly doubled Contaminated like contemporary India. Stoke on Trent was more than four times.

However, I In the 1920s, Britain had a population of 44 million. There are about 400 million people In the face of bad wind It was built in the Ganges River in northern India Huge air pollution crisis.


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