Fisherman empty their net on the banks of the Jacarepagua Lagoon, ringed by high-rise condominiums of the Barra da Tijuca neighborhood of Rio de Janeiro. While some private condominiums in the area have their own sewage treatment plants, the four lagoons of the fastest growing region of Rio receive about 2,800 liters of raw sewage per second.(Australfoto/Douglas Engle)

Fisherman empty their net on the banks of the Jacarepagua Lagoon, ringed by high-rise condominiums of the Barra da Tijuca neighborhood of Rio de Janeiro. While some private condominiums in the area have their own sewage treatment plants, the four lagoons of the fastest growing region of Rio receive about 2,800 liters of raw sewage per second.(Australfoto/Douglas Engle)