A man wears a gas mask during a protest against Chevron's plans to explore for shale gas in Barlad, 266 km northeast of Bucharest, April 4, 2013. Thousands of Romanians across the country protested on Thursday against Chevron's plans to explore for shale gas, demanding the country's leftist government withdraw concessions and ban drilling of the U.S. company's first test wells. About 500 protested in the town of Barlad on the eastern border with Moldova where Chevron has a nearby 1.6 million acre concession, some wearing gas masks, many chanting "Chevron go home." REUTERS/Bogdan Cristel (ROMANIA - Tags: ENERGY CIVIL UNREST BUSINESS)