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DAY 7: Water Conservation and Storage (PDC 2010 with Bill Mollison and Geoff Lawton)

The world of water
The world of water by Snap®

Water Arithmetics

  • 97% of all water on Earth is salt water
  • of remaining 3%:
    • 14% is deep ground water (below 800ft) – this is fossil water that took thousands of years to travel from the surface. It cannot be renewed in our lifetime, and it can only be accessed using heavy-duty pumps. This is the water that modern monoculture farming is sucking up…
    • 11% is shallow ground water (less than 800ft deep)
    • 74% trapped in snow and ice caps
    • ONE PERCENT is lakes/ponds, forests, living systems, soils, rivers and atmosphere
  • There is a constant amount of water in the Earth system. Like energy, it doesn’t come from anywhere and it doesn’t go anywhere; it only changes its position and state. Hence, the water in my body right now could’ve in a dinosaur at some stage :).