Building a House With Diapers用纸尿布建造房屋

A group of scientists has come upwith an unusual way to solve a messyproblem. They’ve taken dirty diapers， andused them to replace some of the sandneeded to build a house with concrete2.

Concrete is one of the most commonbuilding materials in the world. It’s usedto construct3 many things， includingroads， sidewalks， and buildings. Concreteis usually made by mixing together sand，water， and cement4.

But making concrete creates a lot ofpollution. And it uses a lot of sand. Mining5 for sand creates other problemsfor the environment.

A scientist had an unusual idea.What if some of the sand in concretecould be replaced with used disposable6diapers？

Diapers are a huge source ofpollution. In the US alone， over 3.6billion kilograms of them are thrownaway each year. These end up taking upspace in landfills7.

一组科学家想出了一个不同寻常的方法来解决一个棘手的问题。（剩余2430字）