In all the world the animals in the nature are coming back, for example dolphins very near to the coast, birds, and others animals are coming in to the desert cities..
We must think that life is a treasure, and we must learn to be more respectable with the nature.
The message is clear:
Humans are not the owner of its destiny, and the nature can erase the humans in a moment and life will continue and planet earth will be a nice place without pollution in a few years. So, that is the message, we must learn to be more respectable with the planet.
See the photo of the pollution in Spain before and during the quarantine. There are many similars photos of other countries