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.
President, Brazil. Calls for President Dilma Rousseff's resignation were chanted through the streets of Brazil at the start of this year, just months into her second term. Rousseff, who ran on campaign promises to harness oil and boost the economy, is now battling a bribery scandal that involves the national oil company Petrobras. As Brazil's first female president, she was elected in 2010 and was on track to end poverty in the world's seventh-largest economy. But the hopes of her supporters have fallen flat in recent months as her approval ratings have dropped to 13%.