Water Scarcity: Causes and Consequences

Short: Water scarcity means the available fresh water isn’t enough to meet a region’s needs. It already affects billions of people today and is worsening due to population growth and climate change.

In more detail: A distinction is made between physical water scarcity, where actually too little water exists, and economic water scarcity, where distribution infrastructure is lacking.

In detail

• Agriculture as the biggest consumer: Worldwide, about 70 percent of fresh water is used to irrigate fields.
• Climate change as an intensifier: Changed rainfall patterns and more frequent droughts further worsen water scarcity in many regions.
• Groundwater overuse: In many countries, more groundwater is extracted than naturally replenishes, leading to falling groundwater levels long-term.
• Cross-border conflicts: Rivers that flow through multiple countries increasingly lead to political tensions over water rights.
• Virtual water: Products like meat or cotton consume large amounts of water during production, which is indirectly “exported” when imported.
• Desalination plants: In water-poor coastal regions, plants increasingly extract drinking water from seawater, though high energy consumption remains a drawback.
• Saving water daily: Shorter showers, fixed leaks, and water-saving appliances contribute to more conscious use even in water-rich regions (co2-fussabdruck-im-alltag, bodenerosion-ursachen-und-folgen).