abstract
black
contamination
covered
crude
damage
danger
dirt
dirty
disaster
dump
ecology
environment
environmental
fuel
garbage
gasoline
global
industrial
industry
leakage
liquid
mess
natural
nature
oil
petroleum
plant
polluted
pollution
poverty
reflection
sky
slick
spill
spots
stain
surface
tar
technology
texture
textured
toxic
trash
waste
water