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Unstable Ice

The ice cover of earth is inherently unstable. If the earth gets colder, the ice formed becomes both whiter and more extensive. This in turn increases the albedo (reflectivity) of the earth, making it colder still in a vicious circle. Conversely if the earth warms, from increased CO₂ levels, the ice formed becomes both greyer and less extensive. This in turn decreases the albedo of the earth, making it warmer still in a vicious circle.

~ Roedy (1948-02-04 age:69)

The One Horse Shay Effect

In times past when a civilisation wore out its soils and poisoned its rivers it just quietly died. It had almost no effect on any other civilisation. But now with globalisation and world trade at twenty times what it was in the 1970s, it ties the earth together in one unified global civilisation. When it goes, the whole thing will go down more or less simultaneously.

~ Roedy (1948-02-04 age:69)

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