New research shows that by 2050 an additional one billion people will live in areas with high levels of water stress. See where water is scarcest in the world — and why we need to conserve.
Water stress is a measure of how much demand there is for an area’s available water supply. A higher score means more people are competing for water.used a global hydrological model to estimate how renewable water sources — such as rivers and lakes, which are replenished through precipitation — might change under future climate change scenarios. According to their analysis, the Middle East and North Africa regions have the highest level of water stress in the world.
The WRI analysis accounts for surface water, but not groundwater stores that are tapped when lakes, rivers and reservoirs run dry. This means the new estimates may underestimate risk. Many rural areas use groundwater for drinking water and farmers worldwide rely on it for irrigation. But groundwater often replenishes much more slowly than surface water.
Water is used to manufacture goods, extract minerals and produce energy, but its biggest use, globally, is for food production.
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