2 billion people live in countries that are already suffering from water shortages . As the populations of these countries increase, pressure on the supply of water also increases . Climate change makes the situation even worse . This is for a two main reasons:
DROUGHT: climate change is making rainy places more rainy, such as northern Europe . But, what is more worrying is that dry places, such as southern Africa and the Mediterranean, are getting even drier [4,9].
FLOODS: you might think that a lack of water would be your last concern during a flood, but in fact, floods can cause drinking water shortages . This is because floods destroy water supply points and sanitation infrastructure (toilets, pipes, sewage tanks etc. ) . Floods can also mean clean water sources get mixed with dirty water  or seawater , so that the water is no longer safe to drink .
What does this mean for people?
POOR HEALTH: lack of water affects people directly through dehydration. In addition, people may be forced to use unclean water that may spread disease [1,13]. Moreover, droughts and floods may cause crops and farm animals to die , resulting in people going hungry .
MIGRATION: drought often forces people to leave their homes and move to new places . In Syria, for example, multiple years of crop failure caused by drought drove lots of people to move into cities . This is thought to have fuelled the Syrian civil war . As climate change progresses, in dry parts of the Earth 24-700 million people are expected to have to migrate due to lack of water by 2030 .
What can we do?
We need better funding and planning of clean water and sanitation . Moreover, we can use nature to help provide clean water [5,12]. For example, restoring grasslands and forests can reduce erosion, improve water quality , and store water for when it is needed during drought .
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