altitude
andean
andes
bolivia
bolivian
cart
cerro rico
coal
construction
dirt
dirty
dust
employment
equipment
grime
hard
high
houses
industrial
industry
iron
job
labor
light
metal
mine
mine cart
miner
mining
mountain
mountains
nobody
obsolete
occupation
occupational
one
ore
potosi
poverty
profession
railroad
rusty
safety
silver
skill
soot
wagon
wheels
work
worker