We're so enamored by hi-tech things. Slate's Explainer article, The 25-Cent Flood Protection Device, is a great illustration of the efficiencies and advantages of things lo-tech.
It got me to thinking. What other things might be just as, or more effective, by using the lo-tech rather than hi-tech solution?
Now, I am not a Luddite but I think it is worth questioning our modern assumptions.