英文關鍵字
bluegreen
algae
pollution
cyanobacteria
river
background
bacteria
water
summer
nature
green
blue
seasonal
pond
lake
environment
polluted
organic
algal
surface
environmental
toxins
cytotoxins
dnieper
ukraine
abstract
fertilizer
detergents
natural
pattern
bloom
ecosystem
vegetation
phenomenon
danger
harmful
disaster
ecology
problem
floating
intensive
marsh
dirty
toxic
texture
mire
covered