A month ago I visit Madre de Dios. I stayed in Los Amigos Biological Station that was four hours upstream Madre de Dios river, where it converges with Los Amigos river. While on the boat, I could see a huge number of informal/illegal mining camps. This mining causes pollution of rivers by using mercury to extract gold. In 2011, 97% of the gold extracted in Madre de Dios came from informal or illegal operations, and employed over 18,000 people, according to the newspaper El Comercio. I hope that the new government could find a prompt solution to this problem.