accident
asphalt
background
catastroph
catastrophe
chemical
contaminate
contaminated
contamination
damage
danger
dark
dirty
disaster
drainage
earth
ecological
ecology
environment
environmental
factory
garbage
hazard
industrial
industry
lake
liquid
nature
nuclear
pavement
plumbing
poison
polluted
pollution
river
rubbish
sewage
sewer
substance
texture
toxic
trash
waste
water