燃やす
explosion
accident
air
atmosphere
big
black
chemistry
climate
cloud
contamination
damage
danger
dark
dirty
disaster
dry
ecology
emergency
emissions
energy
environment
factory
fire
flame
fuel
future
gas
global
hazard
heat
hot
huge
industrial
industry
nature
outdoor
plant
pollute
pollution
refinery
regulations
risk
safety
sky
smog
smoke
substances
thick
warming