Hi there!
As the Interjector asked this question, I can respond that:-
"This pandemic is surely a reason of concern. But currently, it is also a cause of climatic change. Usually, when temperature or heat increases, then the active cases become low. This is because the pathogen can't survive in hot-dry climatic condition. This is a cause of climatic change.
Also, we see that, during winter season, the cases increases. This is because the pathogen can replicate at favorable cold conditions. This is also a climatic condition.
Hence, climate change is the greatest threat which humanity is facing today."
This will be my answer.