The natural warming and cooling of the Earth is acknowledged and, as you say, has been going on since the year dot. The concern at the moment is that warming has increased at a rate not seen before. In other words, it's not so much the warming but the rate of warming.Just out of interest Notch, what do you think was responsible for climate change for the 4.5 billion years before the last 100 years or so? Do you think it's odd that the reason for all that climate change for millions of years has now stopped and now it's humans burning coal at fault? Don't get me wrong there is massive pollution and no doubt a contribution to climate issues from humans but seeing as it appears to be humankinds fault now what did cause it before??