background

bad

bubbles

changing

contaminant

contamination

defilement

dirt

dirty

dirtying

discharge

ecology

environmental

eutrophication

falling

fan

floating

foam

foaming

froth

gentle

gutter

harmonically

head

issue

lather

matter

organic

organics

pattern

plume

polluter

process

produces

rapid

scum

sewage

soap

soft

soiling

spume

stochastic

stream

streams

suds

texture

tracery

water

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