What are the advantage and disadvantage of recycling construction materials?

Recycle involves process, and the process involves energy. 

The opposite of recycling is disposal, and disposal requires energy too if not, it creates waste. 

The advantage of recycling construction materials is that it can reduce waste which is hazardous to the people. 

However, if the energy required to recycle becomes greater than to dispose of the materials, and it creates much pollution and harm to the people, it becomes a disadvantage over disposing of the construction materials.