green

film

blooming

algae

covered

surface

water

pollute

that

prevents

formation

oxygen

causes

death

aquatic

organisms

environmental

problems

disaster

mud

pollution

environment

swamp

pond

nature

ecology

polluted

lake

plant

dirty

natural

river

marsh

slime

scum

flora

pattern

summer

bog

wet

backdrop

waste

ecosystem

mire

biology

organic

slimy

bloom

algal

dirt

contaminated

danger

growth

background

texture

abstract

color