燃やす
air
ash
black
carbon
causes
damage
danger
dangerous
dirty
disaster
domestic
ecology
environment
environmental
fire
food
fume
garbage
garbage dump
global
hazard
heat
household
landfill
nature
outdoor
plant
plastic
poisonous
pollute
polluted
pollution
problem
rubbish
safety
save
scraps
smog
smoke
trash
trouble
vegetable
warming
waste
world