What is the most amount of damage that a building or facility can do to the environment?

Question: What is the most amount of damage that a building or facility can do to the environment?
- Keywords:
  building,
  damage,
  environment,
  facility
Asked by Beth.Wa to Adele on 12 Jun 2017.
- Adele Wratten answered on 12 Jun 2017:
  
  The one that always sticks in my mind is the Aberfan disaster, where some mining material ended up sliding down a hill and destroying a primary school. But hopefully I can make sure things like that don’t happen!

Question: What is the most amount of damage that a building or facility can do to the environment?