"4D Printing"

4D printing is when you print something and then it completely transforms into something else. Many of us have seen 4D printing before. For example, making a cube from a paper cutout. In the beginning, it was a paper that looked like a T, but then it completely transform into a cube when its folded. In the ted talk, Tibits talked about how the current way of building infrastructure is time comsuming, and wastes materails, energy, and physical human power. Whenever something happens such as change in demands or a natural disaster, the entire infrastucture, lets say for a water system, must be dug up and all the pipes must be rebuilt and put back down. What do we do with the old pipes? Well, we don't need it anymore so it become waste. Instead of building infrastructure that way, what if we create a pipe that changes based on demands. It enlarges (pipe on the right) for increase in demands and shrinks (second picture) when demand deceases.
I think that it is a good idea and we should incorporate that into our future. The pipes especially can be very useful because we no longer have to waste materials whenever demand changes and it is not even that hard to do.

Source:https://youtu.be/0gMCZFHv9v8
https://youtu.be/ow5TgVTTUdY