Verb conjugation of "sostituire" in Italian

What is the next big crisis in the world. No one knows, but experts believe that it will be weather and water related. There is a growing number of arid areas around the globe and many people are living in those areas.
If you press the RED X button, you are deleting that word and it will reappear during the translation phase. The X-button appears in the list only after you press 'show my words' and sorry for the delay in answering.
I hope there were not too many mistakes here. I have learned Spanish not a long time ago and I am still very insecure! Tell me please, where do you come from and what you do?