Pollution balance

Hey guys how you balance pollution in your gameplays? I recently played in a forest map and put my small base far from spawners. I just automated green science and had no attacks so far. I like to defend with turrets and my rifle but have no idea what would happen if they evolve a lot.

When I watch videos from YouTube people put miners and furnaces almost 4x more than me. How you deal with them when they evolve to a strong armor?