(CNN) Coronavirus lockdowns led to air quality improvements in most countries, but the level of pollutants will likely rise as governments lift restrictions and economies swing back into gear, according to a new report.
IQAir's 2020 World Air Quality Report said human-related emissions from industry and transport fell during lockdowns, and 65% of global cities analyzed experienced better air quality in 2020 compared to 2019.
Some 84% of nations polled reported air quality improvements overall.
"The connection between Covid-19 and air pollution has shone new light on the latter, especially as many locations have observed visibly cleaner air -- revealing that air quality improvements are possible with urgent, collective action," the report said.
Researchers from IQAir -- a global air quality information and tech company -- analyzed pollution data from 106 countries, specifically measuring PM 2.5, a microscopic pollutant that can cause serious health risks.
Singapore, Beijing, and Bangkok -- all of which imposed circuit-breaker lockdowns and widespread business closures -- saw the greatest reductions in PM 2.5.
But this effect won't last: air pollution levels will likely rise as Covid-19 containment measures end and businesses restart, the report said. »
