21. Do a calculation to criticize the claim in the following quotation: “The United States holds 437 billion tons of known (coal) reserves, enough energy to keep 100 million large electric generating plants going for the next 800 years or so.” [Forbes (December 15, 1975), p. 28; thanks to Albert A. Bartlett.]
21.
That’s about 5.5 tons/plant/year lb/plant/day, which is unreasonable.