ALGERIA-GAS-SHALE-ENVIRONMENT-DEMO

Algerian opposition leaders and protesters scuffle with security forces during a demonstration against the exploitation of shale gas in Algeria on February 24, 2015 in the capital Algiers. Algeria's state-owned energy giant Sonatrach plans to invest at least $70 billion over the next 20 years to exploit shale gas despite huge public opposition. AFP PHOTO / FAROUK BATICHE / AFP / FAROUK BATICHE