Oil production in Brazil is mostly state owned. There are human rights problems in Brazil related mostly to the killing of environmental rights activists trying to protect the Amazonian forests, but nothing compared to human rights abuses in Saudi Arabia. In Nigeria and Angola, the oil production is mainly the responsibility of multinational corporations like Exxon, Mobil Oil, Shell, Total, etc., which companies are also involved in the Alberta bitumen oil sands. In Nigeria and Angola, problems are mostly related to corruption. In Nigeria , they also have to deal with extremist groups in the northern part of the country. Unfortunately, Canadian and American oil refiners are more interested in profits than human rights.