Senate federal level. Similarly in Argentina, in addition to the Senate at federal level, eight of the country's provinces, Buenos Aires, Catamarca, Corrientes, Entre Ríos, Mendoza, Salta, San Luis (since 1987) and Santa Fe, have bicameral legislatures with a Senate. Córdoba and Tucumán changed to unicameral systems in 2001 and 2003 respectively. In Australia and Canada, only the upper house of the federal parliament is known as the Senate. All Australian states other than Queensland have an upper house known as a Legislative council. Several Canadian provinces also once had a Legislative Council, but these have all been abolished, the last
Tobacco industry in Argentina are concentrated in the north of the country. The provinces of Jujuy and Salta (in the north-west), and Misiones (in the north-eastern Mesopotamia), are the leading ones, with over 45,000 tonnes/year each. The other tobacco-producing provinces are Tucumán, Corrientes, Chaco and Catamarca. Tobacco plays an important role in the economy of the producing areas, which are comparatively poor provinces. The Argentine tobacco industry employs 500,000 people, about half of them directly involved in the planting and harvesting, only about 2% in the manufacturing of the derived products, and the rest in distribution and sales. Therefore, despite the fact that the