The prospect of "Global Warming, a state of planetary change wherein the average ground temperatures of the entire earth are elevated to unnaturally high levels, has been around for a number of years. However, during most of the last two decades, the truths about global warming were frequently questioned and debated. It was decried by conservatives, big business, and even many well-intentioned and intelligent scientists. "Global warming theory was called an error in computation , at best, or at worst it was an outright deception foisted on the public by radical anti-technology, and anti-human environmentalist. However, it is now an establ