Back in 1931, John Maynard Keynes wrote “the economic problem may be solved within a hundred years. . . We must be smart, and ruthless.” We certainly are ruthless. If we were smart, we would stop living off the principle and live off the interest – renewable energy.
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The same messages can be communicated by signalling the letter "K" in Morse code via signal lamp. (While a proper signal lamp may be ideal, a flashlight, probably best employing red LEDs, will certainly fit the bill).
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