Human activities are the main cause global warming.

Okay, so I would like to agree with all of your definitions starting off, and we are going to keep the terms so we don't have definition clashes (like value clashes except more annoying…just kidding I love clashes of any kind that is why I debate) I would like to quickly define predicted: foretell on the basis of observation, experience, or scientific reason. (Merriam-webster) For my quick resolutional analysis, I will state: going by your definitions, mainly that of your global warming definition, all I have to prove is that human activities are the main cause of pollution, which according to your definition of global warming is the predicted cause of, and to show that the prediction is based off of observation, experience or scientific reason. 1st point: Humans are the main cause of Pollution. According to library.thinkquest.org, there are six different kinds of pollution: air, water, land, noise, radioactive, and thermal. a)air- air pollution is mostly caused by motor vehicle exhaust and industrial processes. Through motor vehicle exhaust, the combustion of the fuel creates oxides of lead, nitrogen, and sulpher. These oxides are more commonly known as ‘smog' and when they dissolve into water vapors they create acid rain. Industrial processes create big black smoke, (seen near many cities nowadays) that is nothing more than a gigantic creator of CFC's (clarification: chlorofluorocarbon) that rearrange the structure of the O otherwise known as the ozone layer gas. b) water-defined as being foreign matter that deteriorates the quality of water. The main causes are: petroleum based products, agriculture chemicals, and soil pollution. Quick run through, oil spills etc., pesticides that cover fruits and veggies that humans and animals eat, and finally our chemicals that seep through the ground and enter underground resevoirs. c)land- decomposition of solid waste, and the accumulation of non-biodegradable materials. Also the destruction of our environment falls into this category, such as the fact that every year we are losing 6 million hectares of land, loss of 24 billion tons of topsoil (the soil that lets us grow food), loss of 15 million acres of prime farm land to mismanagement and overuse, etc... the list goes on. d)noise-not a very popular pollution that people focuse on, but here we go: road traffic noise, air traffic, rail traffic, neighborhood noise, industrial noises, etc. while there are natural noises such as waves hitting the beach or even mating calls of monkeys, that are grossly overshadowed by the noise we cause. e)radioactive- the main causes are the disposal of nuclear waste, and nuclear weapons and nuclear powerplants. i think you get this point but just a quickfact, the half life of these radioactive substances have half lives of over 10,000 years. Right now the best america can do is bury these deep underground in some bunker in nevada. f)thermal- the most important type of pollution that is related to this debate. the two types that direct us the most, but are not thought about as much are the deforestation of shorelines and soil erosion. the first one, the deforestation of shorelines contributes greatly to the fact that the trees once holding the shoreline together are now being harvested for paper and etc. without these trees, not only is more soil going into the water, but also increases the amount of surface area of the water. the second type helps explains this more, soil erosion. muddy water that is created by the deforestation of shorelines, makes this water filled with sediment and other materials that have increased the light absorbtion into the water. Because the water now has much more light absorbtion, increasing the temperature of the water. This water heats up, and now we have melting polar ice caps. yes, the melting polar ice caps. Just as an example we have the Ward Hunt Ice shelf that has been in solid condition for the past 3,000 years. It started cracking in 2000 and now is currently in pieces. (NASA) When these break off, they start melting in the much warmer salt water and then raise the water level. And because there are less ice shelves, there is not as much sunlight being reflected back into space, rather more sunlight being absorbed. The cycle just continues over and over. 2) Global Warming Theory exists off of observation, experience and scientific reason. The people who are mostly pushing this theory is the IPCC (Intergovernment Panel on Climate Change) who is made up of over 350 scientific experts and government representatives, and their report was contributed and edited by over 2500 scientific expert reviewers, more than 800 contributing authors, and more than 450 lead authors (IPCC) all from over 130 countries. The specific summary for policy makers included 600 authors from over 40 different countries, more than 620 expert reviewers, and government reviewers and representatives from over 113 countries. (IPCC) I think this counts for observation and experience. For scientific reason, here is their reasoning: We are certain of the following: there is a greenhouse effect...; emissions resulting from human activities are substantially increasing the atmospheric concentrations of the greenhouse gases: CO2, methane, CFCs and nitrous oxide. These increases will enhance the greenhouse effect, resulting on average in an additional warming of the Earth's surface. The main greenhouse gas, water vapour, will increase in response to global warming and further enhance it. We calculate with confidence that: ...CO2 has been responsible for over half the enhanced greenhouse effect; long-lived gases would require immediate reductions in emissions from human activities of over 60% to stabilise their concentrations at today's levels... For my arguments: 1)Yes I agree that over a period of several hundred years the temperature will slowly rise, but to have such dramatic rise in the past few years is not the earth in a cycle, but rather outside influences, more specifically human influences. If we look to my information, supported by the UN and more than 130 countries, as well as hundred of climate experts, they all found the same thing, humans are affecting global warming whether we want to admit it or not. More than that, they have found that we are the cause of over 50% of it all. 2)For burning fossil fuels is only 18%, yes I agree with that too. But, we are not looking to ONLY fossil fuels contributing to greenhouse gases. Methane is not a fossil fuel (look to livestock raised by farmers..;)..) yet it contributes greatly to the global warming problem. If you look back to my first point and proof of pollution and greenhouse gases (specifically water vapor) we see that we do cause the majority. good luck KB