Why is the ocean salty?
I wonder why lakes aren't salty?<p>It's clear why rivers and lakes that eventually empty into the ocean are fresh. Rainwater washes the salt downstream to its ultimate destination.<p>But many lakes do not have an outlet that leads to the sea. Water flows in and evaporates. Where does the salt go in that case?<p>Or is it possible that the article doesn't tell the full story, and that salty rocks are confined to a limited number of areas?