Many analysts have observed that the range of the expected future impacts of anthropogenic climate change is highly dependent upon discount rates.  Depending upon the time horizon and discount rate selected, one can derive almost any desired outcome.  Given this observation, it is crucial that one carefully consider and document one’s reasoning related to choice…

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Image via Wikipedia There are many species ending (i.e., the extinction of mankind) catastrophe scenaria. Many people agree that the most likely is the collision of a 10-kilometer or greater diameter asteroid with Earth (estimated annual risk is 10^-8). Other scenaria include pandemics, global warming, and technology itself turning on its creators. Some potential catastrophes…

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