Opening Statement

Opening Statement

         Hello everyone, my name is Peter Chen, and he is my partner, Jasiu. Today we are debate topic is Global warming and we are Con. we believe global warming is natural and humanity activities do not effect it at all. We have all heard about the treat of man-made global warming. We have been informed that it is cause by the increase of CO2 and human activities o. Therefore we need to sacrifice many things to save our planet because it is all fault! Do Not worry, its not true! you have nothing to do with it.
        The causes of global warming are broadly divided into two categories-- natural causes and anthropogenic causes which is man-made cause. First of all, Co2 is a very weak green house gas if it is one at all. water vapor is what causes the greenhouse gas effect. Second of all, humanity just make 5 percents of world’s Co2, and Co2 cause 5% of the green house gas effect,if Co2 is a green house gas. temperatures control co2, not co2 controls temperatures. Jasiu will explain this on his power point. it is the sun that controls the earth’s and the solar system’s temperature. Earth and other planets are warming up too. in addition to that, there has been times when the temperatures were higher than today an Co2 had nothing to do with it. Third of all, earth is not the only planet that is warming up. Fourth of all, there is "no real scientific proof" that the current warming is caused by the rise of greenhouse gases from man's activity. Fifth of all, warmer periods of the earth's history came arounf 800 years before rises in CO2 levels Therefore both of us believe global warming actually is a kind of natural stuff that the planet have.
     On the packet that Mr. Sutherland gave me shows 14 evidences, here are the one of all that I feel like they are important: Human releases of CO2 cannot cause climate change as any increases in CO2 are eventually balanced by nature could just built up not bigger than 1 percent of it! So what makes this happen? Natural phenomenon which we will show our evidences next. Thank you!