Static view of a waste water flowing from a concrete pipeline onto Pinheiros river in Sao Paulo, Brazil with green grass on the bank

sewage pinheiros river sao paulo water polluted sewer waste drain pipe dirty clean factory industrial plant stream toxic environmental garbage substance chemical drainage environment flow liquid nature tube canal corrosion danger dump ecology fern flowing fluid green industry natural old outdoors pipeline pollution unhygienic urban industrial waste hazardous environmental pollution floating plastic day brazil