automobile
black
car
continent
danger
dirty
disposal
dump
dumped
ecology
flight
gambling
garbage
group
gum
heap
industrial
industry
junk
life
many
old
pollute
problem
recyclable
recycle
recycled
recycling
rubber
rubbish
saw
stack
technology
tire
tires
toxic
transport
transportation
trash
tsar
used
waste
wheel
worn