How's my essay so far? One paragraph for now

I am writing about Global warming.

If the global warming ever gets worse, we will not have enough food. Abnormally dry weather will hurt crops. That’s where our health food comes from. In addition, we may survive by eating animal product, but that would run out eventually. Thus, there’s a lot of vegetarian who don’t eat animal product, so if they all must eat animal product, it will be difficult to buy these food as there are a lot of people.