Water conservation
André Jun Nishizawa
30th of may 2008
Teacher: Michael Coppin

Before starting
● 3 parts
– Importance of water
– Demand, figures and problems
– Solutions

Importance of water
- Sustenance of man
- Essential for the human body

Importance of water
On Earth
● 97.5% is salt water
● 2.5% is fresh water

Importance of water
On Earth
● 97.5% is salt water
● 2.5% is fresh water
● 2/3 snow, ice, glaciers
● 1/3 lakes, rivers, underground (96%)

Demand, figures and
problems
Year Water withdrawn
1900 500 km³
2000 4000 km³
2025 5000 km³

Demand, figures and
problems
Aquifer
●~ underground water
●increasing demand
●bad aquifers