environmental
abandoned
acid
blue
cast
contaminated
copper
deposits
deserted
desolated
drainage
effluent
environment
fossil
geology
industrial
industry
lake
landscape
maroon
mertola
mine
mineral
mining
nobody
old
open
opencast
opencut
openpit
ore
outdoors
outflow
pit
pollutant
pollution
portugal
pyrite
quarry
red
reflection
residues
rock
runoff
sao domingos
site
sulfide
sulfur
water