今日美国20170530期
今日美国20170530期内容节选：
Disease collides with changing climates
In Brazil, an outbreak of yellow fever could be a global danger sign
Mark Johnson and Ryan Patterson Milwaukee Journal Sentinel
SÃO JOÃO PEQUENO, BRAZIL Two years of drought had been hard on Valdemar Braun and his three grown sons. They lived in the hilly, picturesque village of São João Pequeno, and when the rains quit, the coffee would not grow. The farmers were forced to sell some of their cows.
Then at last the showers returned, and 2017 dawned full of promise for the plantations.
Valdemar had given each son two alqueires of land (almost 11 acres). In mid-January, one son helped another clear out forest to plant more coffee.
The portion of forest belonged to Edson Braun, who had recently divorced. He wanted to transfer the land to his exwife so she could provide for their daughters. His brother, Virlei, agreed to help