It is a well known fact that cities are often as much as 5 degrees hotter than the surrounding area. This is for a variety of reasons.
Urban greening – a way to reduce urban heating?
In a human crisis the Natural World often does incredibly well
It would appear that corvid 19 has had a phenomenal good impact on the Worlds atmosphere. The fact that significant portions of of China have been under lockdown has meant that the factories are closed down. Satellite pictures of these places show significantly less pollution then is normally the case.
Similar impacts can be seen over parts of India and western Europe.