Around the world, previously reliable coastal freshwater supplies are being invaded by seawater. This is the strange, slow-moving crisis of saltwater intrusion, and it is increasingly affecting communities around the world. In some places, excessive extraction of groundwater for demands such as domestic, agricultural and industrial has also contributed significantly to saltwater intrusion, letting underground saltwater intrude into soil and rivers.
Find out more
https://www.bbc.co.uk/future/article/20260216-the-unseen-force-turning-water-to-salt
