The first COVID-19 lockdowns improved air quality. Where are we a year later?

What a lunatic and dangerous article published by the University of California Los Angeles! Dreaming of an authoritarian Big Government to clean the air by eliminating traffic etc.!

"The air quality gains of spring 2020 couldn’t overpower the return to driving, record-high heat waves [followed by a record cool winter] or [man made] apocalyptic wildfires, but they did offer a glimpse of what is possible, researchers say. ...
One of the few uplifting developments in the early weeks of the COVID-19 pandemic was the remarkable boost in air quality around the world. As restrictions stilled cars, planes and boats ... that Los Angeles, at least for a day, had the cleanest air in the world ...

But it didn’t last. ... Did the clean air mean anything? Was it evidence that collective action could clean the air faster than many thought possible ..."

The first COVID-19 lockdowns improved air quality. Where are we a year later? | UCLA Getting cars off the road helped, but a brief reduction in traffic only went so far