Not really , people wait until a disaster strikes . Although they should , for clean air and water that are essential !!!

Some move to suburbs and villages from the crowded big cities too .

no doubt about it. But that trend will increase in the next years.

Althugh it has not caused migration, some cases are potential. For instance, the case concerning Tuvalu Islands.

I think there is already evidence that it had happened. But probably it is nothing compared to what we will witness in future decades.

I agree with Mario Iván Urueña-Sánchez,Wolfgang Haupt.

regards

Not much.