So, there's no evidence for anthropogenic global warming either, right?
Well actually, it is the single most evidentially supported phenomena that we know of. There is actually less supporting evidence for the existence of gravity! Historically, the problem has not been a need for evidence, but a need for the evidence to be available to the general public. The sheer volume of data alone is overwhelming even for climate scientists, and the publicly available evidence has suffered from presentation deficiency disorder. This fact alone has been exploited to the maximum by those bereft of any counter evidence, claiming everything from a complete absence of evidence to stringing out a non-controversy over a leaked email conversation. Well, it's time to bury the dead and fill in the grave. Anthropogenic Global Warming is real. And here is everything that you need to know about it: http://climate.nasa.gov/evidence/.
Not a Hockey Stick
The above image is a sample graphic from the site illustrates historical CO2 levels. It may not mean much on its own, other than a clear indication of an anthropogenic influence (Of course, if you disagree please present your alternative explanation), but coupled with actual temperature data it shows a distinct, and undeniable correlation. If there is a better conclusion to draw from this than the Earth is warming and it is because of the influence of Man, then please... please... please present it.
Otherwise here are your two response choices:
1) I'm sorry.
2) Lalalalalalala, I can't hear you!
Image credit: NOAA