Water in a changing world

Getting out of the box : linking water to decisions for sustainable development

Demographic, economic, and social drivers

Technological innovation

Policies, laws, and finance

Climate change and possible futures

Impacts of water use on water systems and the environment

Managing competition for water and the pressure on ecosystems

The earth's natural water cycles

Changes in the global water cycle

Evolving hazards, and emerging opportunities

Bridging the observational gap

Options inside the water box

Options from beyond the water box

The way forward.