![]() There is enough freshwater available globally and averaged over the year to meet demand. : 560 Much of Sub-Saharan Africa experiences economic water scarcity. It also results from weak human capacity to meet water demand. Economic water scarcity on the other hand, is the result of lack of investment in infrastructure or technology to draw water from rivers, aquifers, or other water sources. Arid areas for example Central Asia, West Asia, and North Africa often experience physical water scarcity. : 560 Physical water scarcity is where there is not enough water to meet all demands, including that needed for ecosystems to function. There are two types of water scarcity namely physical and economic water scarcity. Water scarcity (closely related to water stress or water crisis) is the lack of fresh water resources to meet the standard water demand. Water stress is the ratio of water use relative to water availability and is therefore a demand-driven scarcity. Map of global water stress (a symptom of water scarcity) in 2019. Lack of fresh water resources to meet water demand ![]()
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