Traditionally, the best way of taking salt out of water has been through vacuum distillation. The salt water is enclosed at a low pressure to reduce its boiling point, making it easier to vaporize to separate the salt from the water.
the salt water is heated or the water is allowed to evaporate,the water vapour is collected rather than being lostthe water.vapour is condensed to form pure water/fresh water, salt is left behind and can be used for other purposes.
At low latitudes, the thermocline is a zone of rapid temperature over a relatively short depth. it is associated with a similar depth zone marked by a change in density called the pycnocline.
