OK, OKC, so can you, using the scientific, method prove that the earth goes round the sun? What you are asking is much less straightforward than you give credit for. The relationship between textbook science and research science is something you ought to think about. Where did the textbooks come from? How did the sort of certainty you are asking for emerge from fallible humans making observations?
Regarding the proportion of recent warming due to human activity, it's **almost certainly the great majority**. To get to that point we consider multiple streams of evidence. If you are genuinely interested, do read the IPCC WGI , please. Then maybe we can talk about parts of the picture that interest you. More important for practical reasons is that the warming and associated changes we have already seen are almost certainly much smaller than those to come. http://ipcc-wg1.ucar.edu/wg1/wg1-report.html (start with the Summary for Policymakers) is pretty much the best that can be done for you. It may not be what you are asking for but it does summarize the state of knowledge and its sources honestly and effectively. If IPCC is not good enough as a starting place for you we can probably not do better here; its purpose is specifically to address questions like yours, and many of the most respected professionals in the field have contributed time to the process. At present, though you claim to be interested, you don't seem to have taken the time to look into it. mt --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/globalchange -~----------~----~----~----~------~----~------~--~---
