General view of St Paul's Cathedral and part of Blackfriars bridge and the River Thames in silhouette on London skyline obscured by smoggy haze caused by air pollution

Back view of the London Eye on a smoggy, hazy day caused by air pollution with Big Ben and other buildings seen in the background

St Paul's Cathedral and part of Blackfriars bridge in silhouette on London skyline seen through smoggy haze caused by air pollution

Wide shot of hills and dark clouds with pond in foreground. Camera pans to reveal factories and chimney smokestacks churning out pollution.

City of London skyline seen through pink smoggy haze caused by air pollution with Oxo building seen in foreground

Close up of a sign on a beach warning in English and Chinese about polluted waters in Hong Kong. Rubbish laps onto the shoreline in the background.

A crab crawls on oil stained rocks and runs to hide under a rock.

Black clouds of smoke from industrial chimneys of factory emanate against orange sky with bright yellow sun in top right of screen

Bright sun against dark orange sky with clouds of smoke emanating from factory seen in silhouette

Side view of stationary motor cars in traffic queue with cloud of white exhaust fumes wafting through, then cars move off

White fumes puff out of car exhaust pipe as car pulls away, fumes obscure view of tarmac

White fumes puff out of car exhaust pipe then car drives off leaving white cloud behind it

Lines of cars slowly moving in traffic queue along motorway/freeway in China seen through white smog

Very close shot of rusty car exhaust pipe emitting fumes, motor car is in motion and exhaust is shaking, fumes blow over camera lens

Back view of line of wheels of stationary cars in traffic queue with white exhaust fumes puffing from side

Budapest, Hungary: Sequence of heavy traffic on motorway in Budapest. High shots over a multi-lane motorway with slow moving traffic, and a low angle shot of cars driving past.

China: Various shots of smoke belching from chimneys at an industrial plant with the sun setting in the background casting an orange glow over the sky.

Sequence of two shots showing rows of tall smoking chimneys seen faintly through smog and white smoke

General view of smoking factory chimneys on skyline with bright sun shining in orange sky

Budapest, Hungary: Sequence of heavy traffic on motorway in Budapest. Cars driving slowly in a queue, a sign warns of congestion and exhaust fumes coming out from an exhaust pipe of a car.

Back view of motor cars coming to a stop in traffic queue

Nigeria: Various shots of crude oil leaking from a pipeline and flowing into a stream, hands drenched in oil.

Dead, leafless trees and a landfill form the frame for chimneys pumping out white smoke in the distance. Zoom out to reveal heavily degraded land.

Close up of a pile of rusting oil drums, cans and tyres on the bank of a river.

Close view of smoke coming out of top of industrial chimney, next to tower block against orange sky

New Delhi, India: Wide view of traffic at a busy junction, with cars not moving on one side of the road. Close up of tuk-tuks stuck in traffic and cars and people on motorbikes driving past.

Didcot Power Station, Oxford, England: Three steam columns rise from the power station's cooling towers, camera zooms out to reveal many white steam columns rising to the sky.

General view of two smoking factory chimneys and factory structure in silhouette against bright orange pink sky at sunset

Konin: Shot of still lake with power station reflected in the water. TILT up to reveal power station. Close-up shots of smoke belching out from chimney stacks

Close view of tops of two factory chimneys belching and puffing steady stream of smoke upwards against cloudy sky

Wide shot of white smoke rising out of factory chimneys with hillside in the background.

Close up of smoking factory chimney in silhouette and two trails of black smoke against intense orange sky

Berlin, Germany: Long view from Teufelsberg of smoke billowing from chimneys at industrial plant, with trees in foreground.

MS of a pylon in the foreground with industrial complex in the background churning out smoke.

Wide shot of dead small, twiggy trees standing in a river which is blanketed in oil. Camera pans to show the embankment covered in garbage.

Air plane flying over camera and landing on airport runway at dusk in misty conditions with warning lights shining on tarmac

Sequence of shots showing lines of cars slowly moving towards camera in traffic queue along motorway/freeway in China

Gualeguaychu, Argentina: Various shots of paper mill with smoke bellowing out from various chimney stacks.

General view of industrial buildings on London skyline seen through smog, one large chimney is seen against cloudy and foggy haze with some smaller chimneys in foreground emitting smoke

Close view of small plastic water bottle and other rubbish debris bobbing on surface of dirty water in river, bottle has blue hue and water is brown

Heathrow, UK: Ground to air shot of a British Airways aircraft flying low overhead and out of shot.

Medium close up of grey smoke billowing out of factory chimneys and in to the sky.

Large industrial chimney in smoggy surroundings in between two tower blocks

Bright round white sun shines through passing trail of grey/black clouds across middle of screen

Berlin, Germany: Smoke billowing from large chimney of industrial.

Berlin, Germany: Close view of smoke billowing from chimneys.

Long view of line of birds sitting on street lamppost as air plane flies past overhead then close shot of three starling birds sat on lamppost

Heathrow, UK: Ground to air shot of a British Airways aircraft flying low over rooftops and powerlines and off into the distance.

Close view of stream of black smoke puffing and belching upwards

Close up view of a raging yellow and orange fire with flames rising against black smoke in the background.