Brazil’s polluted Rio mangroves were disappearing under waste; then local fishers restored 18.2 hectares and more than 60 animal species returned

Decades of pollution, untreated sewage, industrial activity and waste have placed heavy pressure on the mangroves around Rio de Janeiro’s Guanabara Bay in Brazil. Yet in one of the bay’s remaining protected mangrove areas, local fishers and conservationists have been working to reverse the damage.