Water is the most valuable commodity on earth. And it circulates for our benefit, from ocean to atmosphere to land and down to the sea again. What will it take to sustain for all our benefit this essential and miraculous "circle of blue?"
Our natural environment and the resource base for the world economy are inexorably linked. Therefore these two crucial parts must come together for the house to remain standing, as our species is now heading toward 8 billion by 2025.