Pollution Failure
Not one country in the world was able to reduce its air pollution in 2021 to meet the newly established World Health Organisation’s (WHO) air quality standard, according to a new report.
The UN agency guidelines now state that the tiny airborne particles known as PM2.5 should not average more than 5 micrograms per cubic metre over the year. Those particles are known to cause significant health problems, even in low concentrations. But WHO says only 3.4% of cities surveyed met the new standard after it went into effect last year. It reports that as many as 93 cities worldwide saw PM2.5 levels at 10 times the recommended concentration.
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