<Tab/>Humans have changed the world ever since we have used our brains for more than the normal mammal behavior of other animals. Changes like these have been very significant because we have basically controlled the world and changed it to fit our needs for living and development. Not only have these modifications affected the world, but they have turned around and changed the human race as well. Two major examples of this in global history is the Chernobyl Meltdown and the Great Wall of China. These changes have greatly impacted the lives of those around it as well as the w…