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Reminder : exponential growth is not good

First a reminder to self for later : to calculate the doubling time of a steady growth percentage increase, divide 70 by the percentage to get the doubling time; the doubling time is the time which it takes to double in size using that steady growth percentage.

I got this from this very interesting (and depressing) lecture : Dr. Albert A. Bartlett’s presentation on “Arithmetic, Population, and Energy.”

It’s in eight parts, you can find each piece in youtube on the right-hand side.

I wonder what world my kids will live in, and wether I shouldn’t invest *now* in solar energy…