This sounds like a term paper written by a student with a predetermined agenda, and a bad one at that. Yes we have climate change. Always have. Always will. Sometimes cooling. Sometimes warming. We had both before human "contributions."
I always ask the global warming alarmists what they would do if we had global cooling. Would they proceed to recommend that we burn as much fossil fuel as possible to warm up the climate. Of course they wouldn't!
Global warming is a political religion.