"Black gold" often brings hardship and misery to the societies where it is found. Petroleum-producing countries are plagued by corrupt and authoritarian governments, lopsided and unsustainable economic development and violent conflict. Foreign powers and their huge multinational oil companies often maneuver for control of the oil fields through clandestine operations or outright military intervention. In addition, disaffected rebels challenge governments in hope of winning a share of the lucrative oil revenues. Environmental damage by oil extraction can spark protest movements, which are frequently met by violent repression. Boundary disputes between states over oil reserves represent yet another link between oil and violence. As worldwide oil and gas production peaks and consumer demand continues to rise, prices soar, making conflicts for this increasingly scarce resource even more likely in the future.