...about 65% of indoor home water use occurs in bathrooms. Toilets are the single greatest water user. Only about 10% of our home water supply is used in the kitchen and as drinking water.

...UNESCO has predicted that by 2020, water shortage will be a serious worldwide problem.

...around 80% of the earth's surface is covered in water. 97% of this is salt water, 2% is made up of glaciers. That leaves less than
1% as fresh water.

...reduces the stress on the environment.

...saves money, as there is less consumption
from usual water sources (in hot countries water
is often transported by trucks) and there is also
less water to dispose of (again high costs if
sewage is transported by truck)

...can enable extension of facilities without
requiring upgrade of water supply and sewage
systems (no more overflowing of sewage systems)