accumulation
aridity
backdrop
background
break
canvas
chap
chapped
clay
cleft
clod
contamination
crack
crash
desiccation
dirt
drain
drought
dry
earth
ecology
environment
evaporation
filtration
fissure
flaw
fracture
gap
heath
neutralization
pollution
processing
production
raw
recycled
resources
ruin
secondary
sludge
soil
storage
tarnish
up
waste
water
wilderness
wither
wreck