alley
barrel
chemical
container
corrosive
crisis
danger
disaster
drum
ecology
economic
economy
environment
environmental
factory
fear
fuel
gallon
garbage
gas
hazard
hazardous
industrial
industry
inflammable
metal
nuclear
oil
outdoors
outside
pallet
petrol
poison
pollute
pollution
radiation
radioactive
recycle
recycling
rust
rusting
safety
steel
tank
toxic
urban
warning
waste