"What could be done and what are we doing" with household construction debris ... and similarly on factory waste

It will be great, if School children could send articles on what  could be done with household construction debris. I am certain, they can think  out of the box and not fear whether it could be executed or not.Engineering students and senior school children can send their opinion on what is that one could do regarding factory waste

Do Post

These images are examples when a household goes through renovation.
Can we use them  at all? Any Idea ?