BOA VISTA, Brazil — From 2,500 feet in the air, the dirt airstrip is just a crack in a seemingly endless ocean of rainforest, surrounded by muddy mining pits that bleed toxic chemicals into a riverbed.
The airstrip is owned by the Brazilian government — the only way for health care officials to reach the Indigenous people in the nearby village. But illegal miners have seized it, using small planes to ferry equipment and fuel into areas where roads don’t exist. And when a plane the miners don’t recognize approaches, they spread fuel canisters along the airstrip to make landing impossible.