How To Sue a Country

Fifteen years ago, Parada's work was a minor niche even within the legal business. But since 2000, hundreds of foreign investors have sued more than half of the world's countries, claiming damages for a wide range of government actions that they say have threatened their profits.

Gold mines often use cyanide to separate gold from ore, and widespread concern over already severe water contamination in El Salvador has helped fuel a powerful movement determined to keep the country's minerals in the ground. In the central square, colourful banners were strung up, calling on OceanaGold to drop its case against the country and leave the area.
http://www.theinvestigativefund.org/investigations/politicsandgovernment/2135/how_to_sue_a_country