The following are credible websites for information on climate change:
http://www.ipcc.ch/ the International Panel on Climate Change from which previous reports can be downloaded. The last report (AR4) was in 2007 and so has become dated and now recognised as being conservative – the changes are unfolding faster than their median projection. AR5 is due next year (2014).
http://www.realclimate.org/ is a blog run by leading climate change scientists where genuine science is discussed. It is the go to site if you want informed comment on new papers advancing our understanding.
http://www.skepticalscience.com/ the best go to site to find out if any denialist argument you may happen upon has any scientific support in the peer reviewed scientific literature.
From the website About page:
“The goal of Skeptical Science is to explain what peer reviewed science has to say about global warming. When you peruse the many arguments of global warming skeptics, a pattern emerges. Skeptic arguments tend to focus on narrow pieces of the puzzle while neglecting the broader picture. For example, focus on Climategate emails neglects the full weight of scientific evidence for man-made global warming. Concentrating on a few growing glaciers ignores the world wide trend of accelerating glacier shrinkage. Claims of global cooling fail to realise the planet as a whole is still accumulating heat. This website presents the broader picture by explaining the peer reviewed scientific literature.
Often, the reason for disbelieving in man-made global warming seem to be political rather than scientific. Eg – “it’s all a liberal plot to spread socialism and destroy capitalism”. As one person put it, “the cheerleaders for doing something about global warming seem to be largely the cheerleaders for many causes of which I disapprove”. However, what is causing global warming is a purely scientific question. Skeptical Science removes the politics from the debate by concentrating solely on the science.
About the author
Skeptical Science is maintained by John Cook, the Climate Communication Fellow for the Global Change Institute at the University of Queensland. He studied physics at the University of Queensland, Australia. After graduating, he majored in solar physics in his post-grad honours year. He is not a climate scientist. Consequently, the science presented on Skeptical Science is not his own but taken directly from the peer reviewed scientific literature. To those seeking to refute the science presented, one needs to address the peer reviewed papers where the science comes from (links to the full papers are provided whenever possible).”
http://thinkprogress.org/climate/issue/ for a view on (mainly) USA politics and climate change by Joe Romm. Solid on the science part. Ideologically “progressive”, whatever that may mean in American politics. Exposes the insanity in GOP climate science denial.
http://www.postcarbon.org/ Founded in 2003, Post Carbon Institute is leading the transition to a more resilient, equitable, and sustainable world. Deals all the major issues of our time http://www.postcarbon.org/issues/ , including climate change, providing suggestions for appropriate responses (what we can do).