abstract

aerial

view

algae

algal

bloom

background

bacteria

bluegreen

cyanobacteria

danger

dirty

dnepr

dnieper

dnipro

ecological

ecology

ecosystem

environment

environmental

flora

green

water

lake

marsh

microorganisms

nature

organic

pattern

plant

polluted

pollution

pond

problem

river

summer

toxic

covered

top

surface

various

wastes

from

factories

lead

rivers

lakes

reservoirs