I live near Chicago, and I haven’t seen any warming. In the summer of 1995, Chicago had several days when the highs were at least 105 degrees, and the heat killed a few people. Within the past five years, Chicago hasn’t been over 100 degrees. In Dec. 2007, Chicago had a record 13 days when the temp. remained freezing. A few days, last week, our low was about -20. So far, this winter, we got about 40” of snow, and that’s almost the amount that we usually receive, all winter.
That's anecdotal evidence. It statistical (that can be manipulated) is the only data that matters. In order to have real proof, there needs to be a measured trend of upward average temperatures and sea level. However they manipulate the temps, sea level has actually gone down since 1998 along with real temperatures measured objectively.
The problem is that when you start messing with belief systems, people who hold strongly to them that have the power over other people's lives do not wish to look inaccurate. For them it is better to excommunicate the heretic than face the fact that they are wrong.
It is just a question of time however, since we are in a cooling trend and all indicators are that the sun is less active that it's peak in 1998 and man has very little to do with the global climate changes.
As in all cults, reality eventually steps on the fantasy and the truth comes crashing in.