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.
Corruption is THE major problem in Brazil. But corruption will not going away as it is being combated in the political arena by indicting politicians and making examples of them. Corruption is embedded deeply in Brazilian culture and history proves it. Remove Dilma from the presidency and you get to keep Temer.