Looks like 2005 is on track to be the hottest year on record. Evidence of global warming is shown by the record shrinkage of the Arctic sea ice cover and unprecedented high ocean temperatures in the Gulf of Mexico.
I know that's not the only evidence to prove such theory. Here in BC we almost had no ski season at all. In Switzerland I have been told numerous stories where there used to be large lakes which froze over every winter. This is no longer the case. What sad is that even a lot of the small lakes in Switzerland no longer completely freeze over. What about all of the horrible landslides and torrential rains around the world.
There's an entire article from the Washington Post which includes what we have to do to limit carbon dioxide emissions.