Fighting it locally assumes that we can. It's not always so obvious. Global warming increases the risk of drought, flood, storms, a crop failures. Due to the reduce supply of clean water, and poorer health conditions from the lack of food, disease may more easily spread. In addition, new biological attack vectors for fast mutating viruses, bacteria and amoebas open up. New biological niches can spur a lot of fast evolution for simple organisms. With the high numbers of monoculture crops around the world, this increases agricultural disease risk.

It's not clear that you can prevent these things effectively: you can only try to mitigate them when they do happen.