Water stress measures the amount of available supply a country uses to meet demand, and is expected to worsen as the climate warms.
change as the biggest existential threat to humanity," says Crystal Davis, global director of WRI's Food, Land and Water Program."Water is essential to nearly every crisis we face, because when we don't have enough water, we don't produce enough food or energy.
The WRI says countries are experiencing"extreme water stress" when they are using over 80% of their renewable water supply every year.The higher the water stress, the more vulnerable a country is to water shortages, especially during periods of peak demand like during a heatwave."If a country is using 100% of its available supply, usually you're going to start to see a few bad things happen," says Charles Iceland, director of Freshwater Initiatives at the WRI.
Some forms of energy production also rely on water, which is used to generate hydropower or to cool power plants.Europe has a water problem. Rising temperatures mean its snow is melting, rivers are dwindling, canals are drying up and punishing droughts persistPrevious analysis by the WRI calculated that it would cost about 1% of global GDP to achieve water security for the whole world by 2030.
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