英文關鍵字
abundance
agricultural
algae
animals
aquatic
beauty
cases
cleanup
cloudy
contact
contaminated
danau
dead
dirty
dying
efforts
environment
fish
foul
harmful
health
include
industrial
lake
life
litter
may
measures
murky
odor
people
plants
pollutants
require
restore
runoff
sampah
sewage
substances
unattractive
unhealthy
waste
water