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4. An invention we take for granted - road stoplight pole, (Red Light, Orange and Green)

Tue Jan 7, 2020, 08:49 PM

Jan 2020

I think they got the idea from railroads warning lights, (red and green poles) Yes, How many lives a year does that idea save?

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I think I nailed it. Doodley Jan 2020 #1

Second that. sarge43 Jan 2020 #3

Rope and string. The Velveteen Ocelot Jan 2020 #5

Thank You ...K and R your post...Great Post.. Stuart G Jan 2020 #6

Good point. sarge43 Jan 2020 #7

No clothes. The Velveteen Ocelot Jan 2020 #8

Fig leaves Disaffected Jan 2020 #12

Um ... agriculture? BuffaloJackalope Jan 2020 #11

Great point..Modern agrigulture has saved all of us. Stuart G Jan 2020 #13

#3, Tool making. denbot Jan 2020 #14

I thought of 2 more, 1. thermostat 2. water purification systems. Stuart G Jan 2020 #15