Sapphire Energy's answer is a form of "green crude oil" made from algae, which can be grown on non-agricultural land in shallow paddies full of undrinkable saline water.

CNN: Are biofuels the future of flight?

These days it has managed to persuade Indians to stop boiling their otherwise undrinkable tap water and instead use a now-ubiquitous water purifier known as "Aquaguard, " which has a 75% market share.

FORBES: Magazine Article

The Drinking Water Inspectorate (DWI), which brought the prosecution, said in a statement it had interviewed a number of complainants who all claimed the water was undrinkable because of its appearance.

BBC: Contaminated water fine

He said he accepts the state finding that drilling didn't cause the problem, but that authorities are still trying to find solution for the people who say their water is undrinkable.

NPR: Cause Of Off-Color, Fetid Water Eludes Pa. Town