What should we do about the Earth overpopulating?

We are growing. Extremely fast. I was thinking the other day what is going to happen when our planet becomes too populated? Most of our food is already filled with chemicals and pesticides to provide and meet the demand of our enormous number today. It also says in the movie “The 11th Hour” that our Earth wasn’t even made to support that many people naturally. We aren’t slowing down. People are humping faster than ever. How should we handle this?

I have to write a paper on this so I’d love to hear your thoughts.