swamp

pollution

water

ecology

lake

nature

dirty

polluted

surface

marsh

bloom

river

environmental

pond

algal

algae

disaster

mud

toxic

natural

flora

plant

biology

danger

summer

environment

blooming

harmful

scum

problem

contaminated

waste

cyanobacteria

contamination

organic

slime

growth

ecosystem

ecological

aquatic

organism

floating

texture

color

green

outdoors

abstract

background

outdoor