The coronavirus crisis and the environment / reduction in transport emissions in particular

Here's some transport data plotting.

https://www.theguardian.com/world/ng-interactive/2020/apr/27/the-traffic-data-that-shows-the-road-into-and-out-of-covid-19-lockdown

I don't know how universal adoption of satellite navigation systems is by now, but I guess it can be relied upon to provide a good indicator.

About Wuhan:

It is striking, though, how quickly the city of 23m people returned to normal levels of circulation.

I mean, I would always put 'normal' in inverted commas in a sentence like this, because contemporary travel patterns are bizarre and perverse, but it's basically what I expect to happen afterwards, even with a brief spike to essentially neutralise environmental gains made during the crisis.