Overall of this assignment, I have understood that our earth is "sick". We humans need to "heal" the earth. Global Warming have causes many problem for human but we human who make global warming happens. Many people have died because of disease or disaster. It also affects the economics of the country. However, we need to be reduce the global warming by using less gasoline, recycle and human should help to reduce global warming instead of making the earth temperature increased. Our generation should start taking care of the earth because in the next generation they will suffer if we do not do reduce global warming. Therefore, global warming is a serious issue now. As a business student we are learning it because we need to understand the effect of climate change that will affect us when we have our business and we can start saving the earth.
Among opponents of the mainstream scientific assessment , some say that while there is agreement that humans do have an effect on climate, there is no universal agreement about the quantitative magnitude of anthropogenic global warming (AGW) relative to natural forcings and its harm to benefit ratio.  Other opponents assert that some kind of ill-defined "consensus argument" is being used, and then dismiss this by arguing that science is based on facts rather than consensus.  Some highlight the dangers of focusing on only one viewpoint in the context of what they say is unsettled science, or point out that science is based on facts and not on opinion polls or consensus.  
Divided into three parts—Science, Politics, and Meaning—the book contains a transcript of NASA scientist James Hansen's testimony before the . Congress; George Monbiot's biting, convincing indictment of who is really using up the planet's resources; Elizabeth Kolbert's groundbreaking essay "The Darkening Sea," and excerpts from the work of Al Gore, Naomi Klein, and many others. Even in this age of electronic archives, GWR is essential, as much for Bill McKibben's selection and introductions as it is for its broad spectrum of content.