beautiful

bionomics

burn

consequences

contamination

countryside

damage

defilement

earth

ecology

emissions

environment

environmental

factory

forest

grass

green

harm

hazardous

impurity

inflow

lake

landscape

lifeless

metal

mound

natural

nature

out

outdoor

perith

plant

pollute

polluted

pollution

production

reeds

river

scorched

season

source

stones

stream

summer

tree

trees

yellow