Petróleo Brasileiro SA engages in oil and gas exploration, production, and distribution activities. The company is headquartered in Rio De Janeiro, Rio De Janeiro and currently employs 49,185 full-time employees. The firm specializes in the oil, natural gas and energy industry. The firm is engaged in prospecting, drilling, refining, processing, trading and transporting crude oil from producing onshore and offshore oil fields and from shale or other rocks. Its segments include Exploration and Production (exploration, development, and production of crude oil, natural gas liquids, and natural gas); Refining, Transportation, and Marketing (refining, logistics, transport, trading of oil products, ethanol export, shale processing); Gas and Power (transportation and trading of natural and imported gas); Biofuels (production of biodiesel and ethanol); Distribution (fuel distribution); and Corporate (administrative and support functions).