<http://schema.org/description>
"Very little of the world&amp;#039;s water is usable because of its high salt content, but a process known as desalination may help change that. How does desalination work to turn salt water into fresh water?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/environmental/earth/oceanography/desalination.htm>