I'm not an expert in the field of climate change. In matters beyond my field of expertise I defer to those who have devoted their education to the study of the field.

"There is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities." - http://www.grida.no/publications/other/ipcc_tar/?src=/climate/ipcc_tar/wg1/007.htm

"(i) 97–98% of the climate researchers most actively publishing in the field support the tenets of ACC (Anthropogenic Climate Change) outlined by the Intergovernmental Panel on Climate Change, and (ii) the relative climate expertise and scientific prominence of the researchers unconvinced of ACC are substantially below that of the convinced researchers." - http://www.pnas.org/content/early/2010/06/04/1003187107.full.pdf+html

The concept that the world-wide scientific community is one giant conspiracy to push the idea of climate change is, frankly, silly. The best fitting theory for climate change by those who research the issue is that it's been largely human caused. If convincing data arises that indicates otherwise, then our interperetations will change (that's how science works). However, that isn't the case with our current understanding.