Describe desalination as a method for obtaining potable water from salty water or sea water.

Desalination is a process used to obtain potable water from salty water or seawater. This method is crucial in areas where freshwater sources are scarce. The process typically involves removing salt and other impurities to make the water safe for drinking. Techniques such as distillation and reverse osmosis are commonly employed in desalination. Distillation involves heating seawater to create steam, which is then condensed back into liquid, leaving salts behind. Reverse osmosis uses a semi-permeable membrane to filter out salt and contaminants. Desalination is energy-intensive, but it provides a vital solution for ensuring access to clean drinking water.