Across the world, water scarcity is emerging as one of the most pressing challenges of the 21st century. Climate change is pushing rivers and aquifers into unprecedented extremes, droughts and floods are intensifying, and demand for freshwater is rising with population growth and economic development.

Across the world, water scarcity is emerging as one of the most pressing challenges of the 21st century. Climate change is pushing rivers and aquifers into unprecedented extremes, droughts and floods are intensifying, and demand for freshwater is rising with population growth and economic development.

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