Peruvian National Police burn an illegal gold mining camp in the Madre de Dios region of the Peruvian Amazon. After years of turning a blind eye to nearly 40,000 illegal miners in the Madre de Dios region, officials are moving to halt environmental damage. Photo: Dominic Bracco II/Prime for The Washington Post
BOGOTA, Colombia — A commodity boom has helped pull millions out of poverty across South America over the past decade. It has also unleashed a new scramble for oil, minerals and cropland that is accelerating deforestation and fueling a new wave of land conflicts from Colombia to Chile.