Anthropogenic Global Warming Theory is Correct

I will argue that CO2 is the largest contribution to global warming, at 72% [1] of greenhouse gas emissions, and that greenhouse gas emissions are a major contributor to global warming. 1. The Greenhouse EffectNearly all of the temperature increase observed in the past 50 years is due to a rapid increase in greenhouse gases [2] that cause a phenomenon called "the greenhouse effect". When sunlight reaches the Earth, a small proportion of it is absorbed into the Earth, and subsequently the Earth is warmed. Most of the sun rays reverberate back into the atmosphere, and usually back out into space. Greenhouse gases, such as methane, CO2, and nitrous oxide absorb some of the sun rays as they go back out into space. As a result, the atmosphere is warmed, and subsequently, the Earth. Much of the cause of the greenhouse effect is water vapor, such as clouds. [3]This is not a part of global warming, however, because ever since water existed on planet Earth, this water vapor has been present, and therefore, while it contributes to the warmth of the Earth, does not contribute to the rise in the Earth"s temperature, which in the past 100 years, has gone up about 1.53 F [4]. 2. Causes of EmissionsThe majority of emissions is CO2, as was previously stated to be at 72%. Then comes methane, at 18%, and nitrous oxide at 7%. The remaining 3% is other assorted emissions that are not particularly important in this debate. The biggest causes of the emissions are : [5]- transportation fuels, (14.0%). This is indubitably an anthropogenic cause of global warming. If humans were to cease to exist, which, according to recent studies, seems increasingly likely, emissions due to transportation (planes, boats, cars, etc..) would stop going into the atmosphere, making this cause anthropogenic. - agricultural byproducts (12.5%). This is a largely anthropogenic issue. Obviously if humans went extinct, plants would go on growing, but the issue here is not the growth of plants. It is fertilizer, the amount we have to water, the waste of the obscene amount of food we throw away, etc.. Therefore this cause is anthropogenic. - industrial processes (16.8%). Since this would no longer be an issue without humans, this is anthropogenic. - power stations (21.3%). Again a clearly anthropogenic cause. - residential and commercial sources (10.3%) Will cease to exist when we do.There are many more, but this is over 50%, so I don"t see my listing any more as useful. 3. What kind of effect does a rise in CO2 have? You brought up that CO2, as more of it goes into the atmosphere, becomes less potent. Indeed, for every time the amount of CO2 in our atmosphere doubles, the temperature will rise the same amount, no matter how much more CO2 is going into our atmosphere. Estimates state that this rise would be 1.5 to 4.5 C [6]. The effects of this would be massive. Already, with the 1.53 F rise that is already in place, we are seeing a drastic rise in sea levels, ice melting worldwide at rates and amounts bigger than ever predicted, some of which we can never regain, less fresh water is becoming available, the only reason our crop production isn"t falling is because of GMOs, etc.. [7] These effects will be much worse the more our CO2 amount rises. An estimate says that even if we limit warming to 2 C, water levels will most likely rise by several meters. [8] [1 & 5] http://ih-igcse-geography.wikispaces.com...[2 - 3] http://timeforchange.org...[4] https://www2.ucar.edu...[6] http://blogs.agu.org...[7] http://environment.nationalgeographic.com...#[8] http://www.sciencedaily.com...