This story was produced by  InfoAmazonia  and co-published with Grist. In the kitchen of Alnice Poxo Munduruku, fresh fish keeps the ancestral traditions of those who live along the vast Tapajós River alive. As the fire burns, the family cleans the fish while keeping a close eye on 11-year-old Aleckson. Born with cerebral palsy, which limits his mobility and speech, he has needed continuous care since birth. Like everyone here, he loves fish. But the village’s food carries an invisible danger. Tests by scientists from the Oswaldo Cruz Foundation, or Fiocruz, show that Aleckson, his parents, and nearly everyone in neighboring communities have mercury levels above the safe threshold . Research by Fiocruz indicates that the contamination stems from gold mining, where mercury is used to separate the metal and then spreads through the rivers into the food chain . This poisoning results not only from illegal mining but also from decisions and omissions by the Brazilian government.…