I define human global warming as the abnormal and...
Climate change
Global Warming (or climate change in the hot way) is the thing. It is a win or lose election debate topic. It is also very contested in the public field (media). The IPCC states that it exists and that it is human induced. State intervention is often motivated by climate change concerns. However there are many scientists, people and companies that contest climate change or human induced climate change. They have interesting arguments. I believe that they are mistaken. I define human global warming as the abnormal and significant increase of mean global temperatures caused (in part) by human activity. I expect to win if i can show that 1 climate change (in the sense of global warming) exists 2 it is caused in a significant degree by human activity I consider that my opponent wins if he/she is able to negate either of the above. I will affirm 3 arguments to sustain my position: science cvasi-consensus, observable events in the world around us, mental experiment. At this moment there is near consensus between scientists that global warming exists and is human induced[1]. The scientific model is quite simple to understand and makes sense. It is clear that the weather is influenced by many factors, and some are more powerful than others. The greenhouse effect is a powerful factor as shown by the super greenhouse effect on Venus. [2] Green house gases have increased at the highest level in the last 650 000 years after the industrial revolution. [3] To bring the scientific argument down to the human level and to avoid an authority argument i will point out that ice caps are already melting, the first drowned polar bears were found, more violent weather is happening etc. What is more, the arctic ice shows an increase in carbon concentration and temperature.[4] The mental experiment part is more complex in the sense that it involves the concept of positive feed-back. The oceans trap carbon while they are cold, when they heat up they release carbon. This a positive feed-back loop and it means that things will only get worse.[5] . Humans have reached a level where they can affect the climate. Acid rains and other city related weather are examples of humans influencing weather. In conclusion, from the scientific, factual and mental experiment arguments I conclude that global warming exists and it is human induced. Looking forward for a good debate. [1] http://www.sciencemag.org... [2] http://ircamera.as.arizona.edu... [3] http://news.mongabay.com... [4] http://www.heatisonline.org... [5] http://en.wikipedia.org...