/Reply to Quin.
Lies, Damn lies & Statistics
I am not sure where your stats come from, but the bbc has
these stats.
That suggests a temperature rise of 0.6 degress since 1900, significantly more than your figures. They also comment that "average global temperatures have varied by less than one degree since the dawn of human civilisation, although they fluctuated much more before that." That makes the change look significant in terms of the rescent global climate.
The stats also show the ice caps are significantly thinner, where else would the water come from to raise sea levels by 10-20cm?
More Lies
Just because the media exaggerate & sensationalise does not mean it isn't happening. The phrase "no smoke without fire" comes to mind. The media may make mouuntains out of molehills, but the molehill normally exists in the first place.
The Truth
No one knows. Plain and simple. If someone had the proof to know, then we would all know. The statistics debate shows that we can't even agree on what has happened in the last 100 while we have been observing it, what chance do we have predicting what is going to happen?
Ostriches
However there is little doubt that we, have thrown and continue to throw significant amount of rubbish into the atmosphere. It doesn't take an environmental scientist to work out that changing the atmosphere will effect tour climate. Take a breath from a helium ballon and then talk, pretty big change for a relatively small amount of helium!
Just because you can't prove something isn't true doesn't make it false, that is a classic symptom of the Ostrich, burying it's head in the sand hoping that if it does nothing the problem will go away.
Whilst there is every lieklyhood that the natural chaging of the climate could be to blame, there is also the chance the the earth's natural change was to cooler, therefore hiding the extent of the problem even more.
My View
I personally think that Global warming is happening (not really much argument over that) and that we have certainly contributed, and continue to contribute, to it. How significant our contribution is has yet to be decided but I feel it is the main cause. Such a relatively large change in a small time-span to the climate starting just after Industrialisation is too muc hof a coincidence just to be down to the natural changes in Climate.