introduction to global studies (des)

Part I: In one paragraph, summarize climate change. Has climate change always occurred or is it a newer phenomenon? What are some of the world's biggest sources of pollution (not Nations but the origins of it. For example, factories, cars, etc.)?

Part II: In one paragraph, explain who the world's largest polluters are? Why are they polluting? Are they working on solutions? Which country has taken the most action to reverse the causes of climate change? 

Part III: Finally, what are the impacts on societies if climate change continues to alter our environment? Are there any realistic solutions?