Im, sure global warming has been debated many times, but have we learnt anything from all the data recordings taken all over the world, surly they would show a weather, "trend", in the UK we have had local record breaking weather conditions, rain fall, temperature and wind speed. .But thats nothing compared to say the flooding in Bangladesh and other parts of the world, so is the earth getting hotter? if it is then is it a natural or man made phenomena? I think the best evidence for the past weather conditions would be the ice core samples and" dendrenology"--spelling? taken over the years. if a match is found from the samples taken, then surly we could see at least a 1000 yrs weather trend.