acid
bridge
chemical
clouds
colorful
contaminate
contaminated
contamination
copper
corrosion
cuprum
dangerous
dead
destroyed
destruction
disaster
earth
ecological
ecology
ecosystem
environment
exploitation
garbage
hazardous
industry
iron
kghm
lake
leak
lubin
metal
mine
mineral
most
nature
old
pipe
poison
polluted
pollution
red
reservoir
rudna
ruine
sand
taint
technology
toxic
tube
valve
waste
zelazny