Precipitation in the tundra totals 150 to 250 mm a year, including melted snow. That's less than most of the world's greatest deserts! Still, the tundra is usually a wet place because the low temperatures cause evaporation of water to be slow.
In this period, Brazil came back to the two party political system. With the return of democracy, in 1986, and the establishment of the 1988 Constitution, the multiparty political system was set back and several parties were founded.
Dilma Vana Rousseff is the President of Brazil as of January 2011. She is the 36th President of Brazil, and the first woman president of Brazil. Daughter of a Bulgarian immigrant, Rousseff was formerly a socialist guerilla who fought against the military dictatorship at the time.