abandon
building
city
cleanup
congestion
contamination
damage
danger
debris
discarded
disposal
dump
dumpster
ecology
environment
filth
garbage
hazard
landfill
landscape
litter
mess
outdoor
outdoors
park
recycle
recycling
refuse
removal
road
roadside
rubbish
scrap
sight
sky
stray
street
summer
toxic
travel
unclean
untamed
unwanted
urban
view
waste
wilderness
wildlife
work