Liz Borkowski at The Pump Handlehas an interesting discussion of sewage systems – she points out thatWhile most of sewage systems do a great job of making the water look clean and getting rid of bacteria and viruses, they often aren’t designed to remove synthetic chemicals. With so many of us dependent on daily doses [...]
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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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