燃やす
atmosphere
burning
crater lake
dead
dioxide
dry
ecology
environment
factory
fire
forest
gas
global
grass
grassland
hill
industrial
industry
landscape
lumber
moss
mount scenery
mountain range
mountains
national park
nature
oil
peat bogs
pipe
plant
pollution
polution
river
russia
slope
smog
smoke
soiling
stack
stratovolcano
stump
taiga
technology
torch
tundra
warming
waste heaps
waste pile
widlfire