From above, heavily armed police and officials from the Ibama environmental agency spot a camp: a brown patch of deforested land in the middle of the vast green carpet that is the Amazon. The miner, who gave his name as Eduardo, said he could make 5,000 reais ($1,000) a week working in the camp, adding, "where can you earn that in the city?"In January, the federal police opened an investigation of possible genocide linked to the miners' abuse of the Yanomami and their resources.