The COVID-19 pandemic presents an opportunity for a number of both natural and public policy experiments, which should—albeit are unlikely to—inform public policy going forward.

Does human activity impact the environment? Yes.

Can that effect be mitigated? Yes.

https://www.forbes.com/sites/jeffmcmahon/2020/03/22/video-watch-from-space-as-air-pollution-vanishes-over-china-during-coronavirus-lockdown-then-returns/