Contrast between polluting and clean factories
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- air pollution
- bad
- better
- bright color
- bright colors
- bright colour
- bright colours
- building
- buildings
- change
- changed
- changes
- changing
- chimney
- chimneys
- clean
- color image
- color images
- colour image
- colour images
- concept
- concepts
- conceptual
- contaminated
- contamination
- contaminations
- contemporary
- contrast
- contrasted
- contrasting
- contrasts
- day
- days
- difference
- differences
- different
- dirty
- drab
- drawing
- drawings
- elevated view
- elevated views
- emits
- emitting
- environment
- environmental conservation
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- environmental issues
- environments
- exterior
- exteriors
- factories
- factory
- fumes
- getting
- good
- gray
- greenhouse gas
- greenhouse gases
- grey
- horizontal
- illustration
- illustrations
- image
- images
- improve
- improved
- improvement
- improvements
- improves
- improving
- industrial
- industries
- industry
- innovation
- innovations
- line
- lines
- modern
- modernisation
- modernization
- nature
- no one
- nobody
- old fashioned
- old-fashioned
- opposite
- opposites
- outdoor
- outdoors
- outside
- polluted
- polluting
- pollution
- pollutions
- progress
- progresses
- rail
- rail transportation
- railroad
- railroads
- rails
- railway
- road
- roads
- Sam Brewster
- smoke
- smoke stack
- smoke stacks
- smokestack
- smokestacks
- track
- tracks
- transport
- transportation