How should the status and progress of a country or people be measured and judged?

United Nations Secretary-General Ban Ki-Moon on Tuesday warned that by 2030, half the people on Earth would be living under "water stress," a measure defined as less than 1,700 cubic meters of water available per person per year, unless action was taken.

Addressing the Budapest Water Summit with Hungarian President Janos Ader, Ban noted that while water was a government priority, no government could handle the work alone.

We "need the full engagement of all actors, communities, societies," he said.