The World Meteorological Organization, affiliated with the United Nations, confirmed that the world witnessed a short and sharp decline in air pollutant emissions last year, amid the closures due to the Corona virus pandemic.
In its first-ever edition of the Air Quality and Climate Bulletin, the organization warned on Friday that the decline in pollution was erratic and many regions of the world showed levels that exceeded air quality guidelines.
Some types of pollutants continued to appear at regular or even higher levels.
Petteri Taalas, Secretary-General of the World Meteorological Organization, said: “Covid-19 has proven to be an unplanned experiment on air quality, and has already led to temporary local improvements, but the pandemic is not a substitute for sustainable and systematic action to address the key drivers of both population and climate change and thus protect the health of both people and the planet.” The Geneva-based agency noted an “unprecedented drop” in pollutant emissions as many governments restricted gatherings, closed schools and imposed closures. In particular, the World Meteorological Organization noted that there were decreases of nearly 70 percent in average nitrous oxide levels during the full shutdown measures last year, compared to the same periods from 2015 to 2019, but ozone levels, for example, remained at similar or even levels. soared.