The Geological Society has issued a statement on climate change, which can be seen here.
I've skimmed it and it seems to veer between the sensible and the ridiculous. This bit struck me as particularly amusing:
In the coming centuries, continued emissions of carbon from burning oil, gas and coal at close to or higher than today’s levels, and from related human activities, could increase the total to close to the amounts added during the 55 million year warming event – some 1500 to 2000 billion tonnes. Further contributions from ‘natural’ sources (wetlands, tundra, methane hydrates, etc.) may come as the Earth warms.
The idea of discussing what will happen to carbon emissions two hundred years or more into the future strikes me as, well, eccentric.
Another little bit which I noticed in passing was this sentence:
The Greenhouse Effect arises because certain gases (the so-called greenhouse gases) in the atmosphere absorb the long wavelength infrared radiation emitted by the Earth’s surface and re-radiate it, so warming the atmosphere. This natural effect keeps our atmosphere some 30ºC warmer than it would be without those gases. Increasing the concentration of such gases will increase the effect (i.e. warm the atmosphere more)19.
The paper cited at the end is this one. Read the title:
19 Walker, J.C.G., Hays, P.B. and Kasting, J.F., 1981, A Negative Feedback Mechanism for the Long-Term Stabilization of Earth’s Surface-Temperature. Journal of Geophysical Research - Oceans and Atmospheres 86, 9776-9782.