Suppose human activity has caused a 0.1 Fahrenheit increase in global temperatures so far, and that this sift will grow exponentially with a doubling time of 10 years.
a. How much will temperatures have risen 50 years from now?
b. A politician suggests that a crisis can be averted by simply slowing the doubling time to 20 years. He calculates that after 50 years the shift will be less than 0.6 Fahrenheit, which he can live with. What is the temperature shift after 200 years?
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