Megacities, Mega Air Quality Improvements

Around the world, many megacities are taking proper measures to tackle air pollution, whether it’s through clean transport, waste management, or clean energy, and a recent study shows that air quality is improving.

In order to efficiently tackle this global health issue, key challenges must be addressed, like gathering better data, increasing funding, and improving collaboration in order to develop and apply the most effective solutions against air pollution.

The analysis focused on the measure of air pollution PM 2.5, calculating fine particulate matter made of various kinds of solid particles and liquid droplets 2.5 micrometres or less in size – much smaller than the width of a human hair – that are caused by emission from cars and other vehicles, solid fuels like coal, wood, and kerosene, industrial emissions, and waste burning. It also based its calculations on data collected by IQAir, a Swiss data provider and manufacturer of air quality products, in cities with a population of more than 10 million. Out of the 25 megacities with available data, 21 improved air quality between 2017 and 2022 through different measures, like prioritizing cleaner and fewer cars, promoting walking or cycling, expanding public transportation, and experimenting with low-emission zones. Also, collecting and processing waste appropriately is paramount to avoid open burning, which releases toxic smog and contributes to air pollution. Countries worldwide are investing in renewable energy, phasing out coal, and exploring alternatives.