None of the predictions [put forth by enviromentalists who allege the anthropogenic cause of climate change (global warming)] is based on any kind of scientific experiment. Nor could they be. A scientific experiment would require a laboratory somewhere that contained two identical planets, Earth 1 and Earth 2. There would be just one difference between them. The human population of Earth 1 achieves an Industrial Revolution and rises to the level of energy use and standard of living of our own present-day Earth and its likely level of energy use within the next century. In contrast, the human population of Earth 2 fails to advance beyond the energy use of the Dark Ages or pre-industrial modern times. And then the scientists in the laboratory observe that the average temperature of Earth 1 comes to exceed the average temperature of Earth 2 by 4 degrees, and that of its Arctic region by 5 to 8 degrees, and that its sea level proceeds to rise by the number of feet described, while the sea level of Earth 2 remains unchanged.
This is not how such temperature and sea-level projections are arrived at. They are reached on the basis of combining various bits and pieces of actual scientific knowledge with various arbitrary assumptions, which combinations are then fed into computers and come out as the results of “computer models.” Different assumptions produce different results. The choice of which bits and pieces of scientific knowledge to include also produces different results.
The whole current debate/process is reminiscent of witch doctors urging primitive people to sacrifice their sheep and goats in order to mollify the wrath of the gods, today’s environmentalists and their shills in the media and academe repeatedly urge the people of the United States and the rest of the modern world to sacrifice their use of energy and their standard of living in order to avoid the wrath of the Earth and its atmosphere.