This is a reportage granted by Pulitzer Center about the Maranhão State's marshlands, a place ignored for centuries due it unusual Amazon landscape and called "the forest's fringe". Due to the Amazon surrounding area's economic development, the marshlands has been several times impacted and the local traditional communities drastic affected. Everything started in the 60’s with the implementation of the buffalo creation industry in the area. Due to the high number of buffalos, and for being a new species brought into an almost untouched ecosystem, the marshland's waters were contaminated and the local environmental balance was broken. Not only for that, the buffalo ranchers grabbed most of the local indigenous territories which led to conflicts and the almost extermination of the Akroá-Gamella group. Fighting decades for their lands, now turned in to the city of Viana, this group is now seen as a threat by local residents and several times were attacked by gunmen forcing them to leave their ancestral lands. Not only for that, the marshlands is also the shortest way connecting the Carajá Iron mines, the biggest of this kind in the world, to the closest exportation port. So, in the 80's a huge railway was built to transport the iron also brought environmental problems. Decades later, in 2020, a huge power line was constructed crossing the marshlands to bring electricity to the iron industry caused the worst environmental problem faced in the area. Built during the fishes' reproduction season, the construction led to its extinction of the animals. Due to its high-voltage and magnetic field, even two years later, the fishes have not returned, and since then, the local indigenous and traditional communities are facing economic and food insecurity issues.