well I've never met a hippy who knows anything about it....most of them just protest about it....lol
The people who are finding this evidence....are people with 20 or 30 years experience in the field.....and they are comparing temperature results over many years....and seeing a stark difference....=)
Im prepared to believe that somethings amiss, as these environmental experts do keep bringing out very strong results to show the earths temperature is rising....and will probably continue to, for whatever reason.

I do think 'global warming' is attributed to far too fucking much though, eg greenpeace uses global warming as an excuse not to build houses on baron land where trees arent fucking growing anyway....it gives people a bad feeling about the issues when the unemployed activists start making up results to influence whether or not Barratt builds some more homes which people need to live in regardless.