I have been looking at both sides and one side uses the hockey stick graph, the other side says that that graph was based on flawed data and doesn't even show the medieval warm period or little ice age. I've seen the graph and it's looks to be true that the medieval warming period and little ice age aren't there - if they were, it would paint a very different picture. Which side do I believe?
Which side do you believe?
The scientific consensus is that anthropogenic global warming is occuring. See this article entitled BEYOND THE IVORY TOWER: The Scientific Consensus on Climate Change by Naomi Oreskes, published in the Journal "Science" in December 2004.
Policy-makers and the media, particularly in the United States, frequently assert that climate science is highly uncertain. Some have used this as an argument against adopting strong measures to reduce greenhouse gas emissions... Such statements suggest that there might be substantive disagreement in the scientific community about the reality of anthropogenic climate change. This is not the case.
http://www.sciencemag.org/cgi/content/full/306/5702/1686
Or read this statement issued jointly by 13 scientific academies in the world for the G8 summit in 2007, including the National Academy of Sciences in the United States, the Royal Society of the UK, the Royal Society of Canada, and the major scientific academies of Germany, Japan, France, Italy, China, Russia, South Africa, Brazil, Mexico and India. It reads:
In 2005, the Academies issued a statement emphasising that climate change was occurring and could be attributed mostly to human activities, and calling for efforts to tackle both the causes of climate change and the inevitable consequences of past and unavoidable future emissions. Since then the IPCC has published the Working Group 1 part of the Summary for Policymakers of its fourth assessment report, and further reports are expected later this year from IPCC. Recent research strongly reinforces our previous conclusions. It is unequivocal that the climate is changing, and it is very
likely that this is predominantly caused by the increasing human interference with the atmosphere. These changes will transform the environmental conditions on Earth unless counter-measures are taken.
http://www.pik-potsdam.de/news-1/G8_Academies Declaration.pdf
Or read the statement by the American Association for the Advancement of Science:
The scientific evidence is clear: global climate change caused by human activities is occurring now, and it is a growing threat to society. Accumulating data from across the globe reveal a wide array of effects: rapidly melting glaciers, destabilization of major ice sheets, increases in
extreme weather, rising sea level, shifts in species ranges, and more. The pace of change and the evidence of harm have increased markedly over the last five years. The time to control greenhouse gas emissions is now.
Delaying action to address climate change will increase the environmental and societal consequences as well as the costs. The longer we wait to tackle climate change, the harder and more expensive the task will be.
http://www.aaas.org/news/press_room/climate_change/mtg_200702/aaas_climate_statement.pdf
Or listen to an interview with John Holdren, the president of the AAAS on the issue:
http://www.abc.net.au/rn/scienceshow/stories/2007/1855511.htm
Or read the transcript:
The current situation of the world in relation to the climate problem is that we're in a car with bad brakes driving toward a cliff in the fog, and the fog is the scientific uncertainty about the details that prevent us from knowing exactly where the cliff is. The climate change sceptics are telling us that the fog is a consolation and that we shouldn't worry because we're uncertain about the details, but of course any sane person driving a car toward a cliff in the fog and knowing that the brakes are bad, that it takes the car a long time to stop, will start putting on the brakes, trying to slow the car, without knowing exactly where the cliff is but just in the hope that by putting on the brakes we'll be in time to keep from going over the cliff. You don't have to be sure that you can still avoid going over the cliff to put on the brakes, you want to do it in any case. And that's what the world should be doing with respect to the emissions of greenhouse gases that are causing this climate problem. There's a chance we'll go over the cliff anyway but prudence requires that we try to stop the car.
http://www.abc.net.au/rn/scienceshow/stories/2007/1855511.htm
There are legitimate doubters out there, some of whom are scientists. They represent a tiny and shrinking minority. I hope I don't misrepresent anyone when I say that I think everyone on this forum fervently hopes this tiny minority is right.
But anyone who implies that the numbers of scientists who are GW doubters is anywhere close to the number who accept it is distorting the truth.
Furthermore, if GW is occuring, the consequences of inaction are so high that prudence would call for reducing emissions even if you're unconvinced.