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Water conservation
 

Water conservation

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    Water conservation Water conservation Presentation Transcript

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    • Demand, figures and problems Year Water withdrawn 1900 500 km³ 2000 4000 km³ 2025 5000 km³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