MNN Galleries

The 15 most toxic places to live

Rondonia Brazil

Photo: National Geographic/Getty Images

6 of 17

Rondonia, Brazil

Rondônia is a state in northwest Brazil which, along with the states of Mato Grosso and Pará, is one of the most deforested regions of the Amazon rain forest. Thousands of acres of forest have been slashed and burned here, mostly to make room for cattle ranching.