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!