These are two of the charts that Al Gore put in his movie in 2006. Scientists can drill down onto the ice in Antarctica and bring up core samples which can show them the past temperature of the earth and it's CO2 levels (among other things) back 650,000 years. They can tell this by the structure of the water molecules which have been in the frozen water. The blue line indicates the earth's temperature back 650,000 years and the red line indicates the CO2 levels at the same time. You can easily see that they are directly corresponding with each other. A rise in CO2 levels creates a rise in the earth's temperatures. College professor Roger Revelle had been charting these levels since 1965. Al Gore had to get a lift to show the rise in CO2 levels which you can see by the upward red line. This upward trend started in 1945- at the beginning of THIS generation. Never before had CO2 levels gone half as high as it is today. The rise in heat cycles which occurred back 100s of thousands of years ago which people say happened- did happen. But they are so small, you can hardly see them. Even the ice ages are very small compared to the extreme changes that are happening today. People have said, "Oh the temperature has only gone up one degree. Not a big deal." That is true. one degree AT THE EQUATOR. 1+ degree at the equator equals 12+ degrees at the North Pole. Someone criticized me because they thought I was not concerned about my fellow man. So, ask yourself this question: If in only ONE GENERATION we have caused this much changed which is going off of the chart, what are you going to leave for your children and grandchildren?