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There is an interesting website that tries to balance man-made and natural cyclical warming but favors the man-made theory, as shown in the following quote (http://ossfoundation.us/projects ... rming/natural-cycle):|
"Is global warming a natural cycle? Or is global warming affected by human influence? What does the science say? Both are true. In the natural cycle, the world can warm, and cool, without any human interference. For the past million years this has occurred over and over again at approximately 100,000 year intervals. About 80-90,000 years of ice age with about 10-20,000 years of warm period, give or take some thousands of years.
The difference is that in the natural cycle CO2 lags behind the warming because it is mainly due to the Milankovitch cycles. Now CO2 is leading the warming. Current warming is clearly not natural cycle.
Where are we currently in the natural cycle (Milankovitch cycle)? The warmest point of the last cycle was around 10,000 years ago, at the peak of the Holocene. Since then, there has been an overall cooling trend, consistent with a continuation of the natural cycle, and this cooling would continue for thousands of years into the future if all else remained the same. But since 1750 however, the CO2 content of the atmosphere has deviated from the natural cycle. Instead of decreasing, it has increased because of the fossil-fuel burning. Methane and nitrous oxide have also increased unnaturally because of agricultural practices and other factors. The world has also warmed unnaturally. We are now deviating from the natural cycle.
The natural cycle is understood by examining the paleo records. The fact that the earth goes in and out of ice ages distinctly outlines the natural cycles of Earth's climate. This occurs about every 100,000 years. We are currently in a warm period. Generally, Earth spends about 80-90,000 years in an ice age and around 10-20,000 years (or so) in a warm period."
Next question is, "Is it bad to prevent or delay the next Ice Age, until mankind has found a solution to surviving it?" It might not come for another thousand years or more, and so, that might be long enough time. Or, there may never be enough time to do that, but we can cause more loss of lives in the meantime by not reining in our man-made warming of the world.
Carbon tax is another matter. That is a politcal and economic proposition that goes beyond mere climate change. It restricts the growth of human populations by limiting their availability of energy, like tamping down the temperature of a culture medium in order to reduce its microbial population. Is it moral? Is it humane? Or, is it necessary for the greater good of all? Are we on Easter Island? Or, are we in Eden?