Dirty Art

Dirty Feet

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Dirty Father Thames

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Chemically Polluted Waterway

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Outflow Pipe Discharging To The Mersey

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Volcanic Lightning

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Chemically Polluted Waterway #1

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Sewage Outfall #1

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Urban Vacuum Waste Disposal System

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Sewage Water Outlet

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Artwork Showing Giotto Nearing Halley's Comet

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Refugee Woman Collecting Grains

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Wastewater Treatment Works

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Hospital Laundry

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Dust Bowl

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Landfill

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Dirt-wrapped Tornado

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1833 Cholera Pandemic Grandville Cartoon

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Dirty Teeth

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Dirty Teeth #1

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Dirty Teeth #2

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Dirty Teeth #3

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Destruction Of Bacteria On Dirty Cloth

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Boy Washing Dishes In Dirty Water

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Levelling Farm Fields

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Wastewater Pollution

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Dismantling A Natural Gas Drilling Rig

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Protest Against Keystone Xl Pipeline

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Protest Against Tar Sands

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Gas Station Roadsign

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Protest Against Tar Sands #1

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Dismantling A Natural Gas Drilling Rig #1

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Contrasting Buildings In Mumbai

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Protest Against Keystone Xl Pipeline #1

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Dusty Wine Bottles

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Protest Against Tar Sands #2

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Landfill Scavenging #1

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Ugly Milk-cap Fungus

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Protest Against Keystone Xl Pipeline #2

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Protest Against Keystone Xl Pipeline #3

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Protest Against Keystone Xl Pipeline #4

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Glass Of Red Wine

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Protest Against Tar Sands #3

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Space Station Microbe Sampler Kit

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Protest Against Keystone Xl Pipeline #5

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Dismantling A Natural Gas Drilling Rig #2

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Insulating A Mobile Home

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Weatherproofing A Mobile Home

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Dismantling A Natural Gas Drilling Rig #3

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Protest Against Tar Sands #4

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Weatherproofing A Mobile Home #1

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Protest Against Keystone Xl Pipeline #6

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Glass Of Red Wine #1

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Septic Tank.

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Crossness Sewage Treatment Works

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Sewer System

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Protest Against Keystone Xl Pipeline #7

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Dismantling A Natural Gas Drilling Rig #4

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Protest Against Tar Sands #5

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Harvested New Potatoes

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Riverside Slums

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Pigs

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Overflowing Litter Bin

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Bacteria On Fabric Surface

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Iceberg

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Boy At A Refugee Camp

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Pig Looking Through Bars

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Harvested Potatoes

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Whisk And Sauce

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Loaded Dishwasher

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Harvested New Potatoes #1

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Open Sewer

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Surgical Instruments

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