Oil floats on the surface close to oil facilities at the Lake Maracaibo in Venezuela's western state of Zulia July 7, 2010. The area has been blighted in recent weeks by several leaks from the tangle of antiquated pipes, pumps and other oil installations that crisscross the lake, one of the oldest energy hubs in the Latin American OPEC member. Picture taken July 7, 2010. REUTERS/Isaac Urrutia (VENEZUELA - Tags: DISASTER ENERGY ENVIRONMENT)