Weeds growing in sidewalk cracks – a very common sight. Think of how much money and time would be saved if one engineer would invent some kind of flexible, strong and long-lasting caulk that could go in the cracks…
– Time spent replacing broken and eroded concrete would be lessened.
– Time spent removing the weeds would be prevented.
– Money spent funding workers to do both would be saved.
So come on, engineers, find an investor and go for it!
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