RE: In 20 years, water demand will exceed supply by 40 percent
Oh My God! It's the end of civilization!
Remember the Population Bomb in the 70's. It predicted that
mankind would be starving by the year 2000 because of the
population growth.
Good sense household water management including grey water
in the landscape are sensible measures we should and I'm sure
will implement in the near future, but these doom and gloom
scenarios are always overblown.
Thankfully, there are 40,000 dams just in the US alone that you
can throw yourself off of in order to avoid this calamity!