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.
Brazil's President Dilma Rousseff has been removed from office following an impeachment vote in the Senate. Here we take a closer look at the problems in Brazil and what went wrong since Ms Rousseff was elected for a second term in October 2014. Image copyright Image caption Dilma Rousseff was removed from office following an impeachment vote in the Senate.