In Brazil, health authorities suspect the mosquito-borne Zika virus is tied to a severe birth defect. They've urged women in certain regions to avoid getting pregnant.
Dilma Rousseff is accused of manipulating government finances to benefit her re-election effort. The proceedings come at a time of widening political scandals and a sharp economic downturn.
Brazil's Environment Ministry announced that deforestation in the country has increased by 16 percent. A separate study warned that more than half the Amazon's tree species may be threatened.
In Sao Paulo, home to 20 million people, water shortages have become part of daily life. Some residents are leaving for lusher regions. Ecologists say Amazon deforestation may be affecting rainfall.
It's spread quickly in South America and was reported in Mexico this week. It's not fatal, but there's concern about a potential impact on babies born to infected moms.
You read the stories in our #15Girls series and posed some really good questions. (Wish we'd thought of them first.) Here are answers from our correspondents.
Ivo Cassol is a prominent Brazilian politician who made his money in cattle ranching and logging in the Amazon. He says the world should pay Brazil a lot more if it wants to preserve the rain forest.