How will water treatment help the growing population of the earth?

Question: How will water treatment help the growing population of the earth?
- Keywords:
  population,
  treatment,
  water
Asked by Lucy to Richard on 10 Mar 2015. This question was also asked by The Arch-Bishop Of Banterbury.
- Richard Simons answered on 10 Mar 2015:
  
  With a growing population comes growing demand for resources, and if resources are scarce people are driven to riskier options. When there’s a limited supply our fresh water people are forced to rely on dirty and untreated sources of water, hugely increasing the risk of illness, and even death.
  By developing smart and sustainable water treatment resources we’re turning dangerous water sources into safe resources for communities around the world.

Question: How will water treatment help the growing population of the earth?