No one needs to prove it's due to humans; it doesn't matter what it's due to, it only matters that it's bad for us and we can do something about it. Natural is

No one needs to prove it's due to humans; it doesn't matter what it's due to, it only matters that it's bad for us and we can do something about it. Natural is not equal to good, claiming it matters if humans caused it is as stupid as refusing to stop an asteroid from hitting us because it's not a man made disaster.