These sausage-shaped objects are an innovative technology.
They are filters filled with human hair and placed strategically across the Bom Jesus inlet in Guanabara Bay.
An orange barrier on the water already stops trash from entering the mangroves.
These hair filters block oil as well.
"The idea is the oil that flows here be absorbed by that hair barrier so they are attached to the orange rubbish barrier, which floats, and we use it as support for the Fiotrar barrier," says Ana Beatriz Gonçalves, an environmental engineer who oversees the weekly maintenance of the new barriers.
