Erica Cristina has been “breathing in smoke every day” since a large fire broke out across the river from the city of Corumba, the gateway to Brazil’s Pantanal, the world’s largest tropical wetlands. Erica Cristina has been “breathing in smoke every day” since a large fire broke out across the river from the city of Corumba, the gateway to Brazil’s Pantanal, the world’s largest tropical wetlands. Environment Phys.org – latest science and technology news stories