Global warming

The strongest evidence yet that global warming has been triggered by human activity has emerged from a major study of rising temperatures in the world's oceans. The present trend of warmer sea temperatures, which have risen by an average of half a degree Celsius (0.9F) over the past 40 years, can be explained only if greenhouse gas emissions are responsible. As the Pro side of this resolution I would like to define global warming as, "Increased levels of gases such as carbon dioxide that trap heat in the earth's lower atmosphere potentially causing global warming" (www. ifdn. com/teacher/glossary. htm) "-she would like to say I have given no proof but nether has she she neglects to say that global warming is a theory and has not been proven scientifictly but on my side i have history not lose assumption. " You are correct you have given no proof, no sources, no research, no anything that I can accept is true on your behalf. Every argument I have gotten I cannot accept merely because it was written, in poor condition and their is no proof, unless you are a new scientist that I have no heard of, I find every argument of yours is wrong. I would like to define proof as a formal series of statements showing that if one thing is true something else necessarily follows from it. (wordnet. princeton. edu/perl/webwn) I neglect to say that global warming is a theory? The whole point of this debate is for the Pro to prove that global warming is real, and not a theory. Why would I contradict myself? Do you find everything I am posting to be lose assumptions? Maybe you should scroll up to my sources. "-over the last ten million years the world has been around 4 billion of those years have had living life on her contanents and with that said 67% of the time the world has hade living life on it the planet had little to no ice on it. 65 million years in the past a astroid hit the planet this set of the trend of heating and cooling that we are experancing 2 day. There has been 4 Major ice ages since then. along ith many other little ice ages. and off course with the end of a ice age u have a warming period. " "As early as the nineteenth century, scientists recognized that greenhouse gases warm the planet, and that increases in atmospheric carbon dioxide (CO2) could lead to global warming on much shorter time scales than the natural, cyclic fluctuations related to ice ages and interglacials. Around the same time, global temperatures began to rise, and scientists became increasingly concerned that humans were interfering with the climate. In the 1950s the upward trend in global temperatures unexpectedly halted and temperatures declined somewhat. This led some to become concerned about global cooling, and, in turn, newspaper headlines proclaimed an imminent ice age. Climate skeptics often point to that period as evidence that climate scientists are not to be trusted – warnings of global cooling back then, warnings of global warming now. Over the past quarter century, scientific research on global climate change has intensified; international programs have been organized. We now have detailed, global data sets from satellites and ever-more sophisticated instruments. Computer models, incorporating more and more data and capable of recreating past trends, can more precisely predict future scenarios. As a result, our understanding of the climate system is immeasurably stronger than in the 1970s. The National Academy of Sciences, which admitted we did not know enough to "pose the key questions" in 1975, now says: "Greenhouse gases are accumulating in the Earth's atmosphere as a result of human activities, causing surface air temperatures . .. to rise. " (NAS, 2001) "The scientific understanding of climate change is now sufficiently clear to justify nations taking prompt action. . .. We urge all nations . .. to take prompt action to reduce the causes of climate change. " (NAS [pdf], 2005)" (. http://www.nicholas.duke.edu...) Once again, I apologize for the confusion that has been caused in the first and second rounds. I strongly urge for a vote in affirmation of the resolution.