Water problems

We have two kinds of water problems: too much and not enough. The oceans cover 70 percent of our planet, and they contain 97 percent of the water on Earth. Samuel Coleridge in the Rime of the Ancient Mariner:

“Water, water every where,

Nor any drop to drink.”

The remaining 3 percent is freshwater (no salt), and approximately 69 percent of that freshwater is ice at the South Pole (Antarctica) and t...