Perth and Melbourne use it in Australia because they are near the sea, Israel, Saudi Arabia, and several Persian Gulf countries use desalination plants as well given the amount of desert they contain.
all countries that have access to water
Australian cities are planning to build desalination plants to get more water ready to use instead of waiting for it to rain
Illinois does not need desalination plants. It has plenty of fresh water from Lake Michigan.
Most desalination plants in the Middle East are on the Arab coastline of the Persian Gulf in countries like Saudi Arabia and the United Arab Emirates. However, some are starting to be built in Israel as well.
They have them because some countries don't have fresh water and the only water is sea water.
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The use of desalination plants is controversial. Two major concerns are:they use a lot of energy, which is supplied by coal-fired power plants. Apart from the pollution caused by these plants there are many who feel that they are not sustainable. That is, they cannot continue to operate without putting the environment and our future at risk.the water flowing back to the sea contains much more salt than normal sea water. It is also warmer. This can affect marine animals and plants that live near the desalination plant.
Because without desalination the salt in the water would kill the plants.
reverse osmosis
There is ample natural fresh water available in most places.
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