seawater

As carbon dioxide is pumped into the atmosphere, about one-third of the excess is taken up by the oceans, where it converts to an acidic form with potentially dangerous ecosystem consequences. http://explorations.ucsd.edu/Features/2009/Carbonated_Oceans/

There's one way Scripps Institution of Oceanography at UC San Diego researchers see the future of desalination in California going. Before a regulatory structure can take shape to govern how seawater is treated and transported to a thirsty public, a gubernatorial order will be handed down that fast-tracks the construction of desalination plants during an episode of extreme drought when battles over water turn violent. Ecological casualties would be assured.

A documentary about volcanic eruptions, their causes and effects on Earth and the geological implications of those events in history and in the future - Part 2.