Hudson Bay, Canada: Wide view of two polar bears walking along on icy tundra with an orange glowing sky in the background.

Aerial shot passing over large deforested area in the Amazon rainforest in Brazil, with white smoke rising from burning trees. Small fires and single trees can be seen through the clouds of smoke

Close view of top of chimney with black smoke billowing out against cloudy sky

Stationary view of three cooling towers in a line at power station with smoke coming out of chimneys against cloudy sky , barbed wire fence seen in foreground

Top of chimney with black smoke billowing out against cloudy sky, then camera pulls out to show long factory chimney

Canada, Hudson Bay. Wide shot of icy bay. Zoom in to polar bear lying on shards of broken ice. Polar bear stumbles walking along on cracked ice

A large iceberg and thawed ice floating on arctic waters with a starburst sun shining brilliantly on the blue sky.

Mexico: Dried maize crops in a field, farmer looks at dry crops, dry tomato plants.

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

Back view of people along in heavy rain at night, one is wearing a blue cagoule and the other has pulled their outer clothing over their head

Two men in orange emergency dinghy along in flood water then camera zooms out dramatically to show aerial of flooded Yorkshire countryside

Antarctica: A vast, desolate landscape covered in snow and ice with sun shining in the distance. Snow blows over the surface of the ice.

General view of large iceberg, part of ice cliff breaks off and falls into water (calving) in Antarctica

Travelling aerial views over flooded fields in the Yorkshire countryside

Tracking shot moving along calm water of fjord in Hinlopen past melting icebergs with view through natural arches in the ice

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

Sequence showing various views of the Thames Flood Barriers on the River Thames in London, including long view of the Millennium Dome and the gleaming steel roofs of the barriers in winter sunshine

Single melted ice floe floating on surface of calm water in sea in Fjord in Hinlopen at sunset with water lapping on beach and bare mountains in distance

Arctic Circle: Aerial view flying over mountains with white untouched snow everywhere.

General view of flooded street at night with dustbin floating along on its side in flood water, orange street lights reflect on water

Aerial shot over brushland in New Zealand being consumed by a vibrant orange bushfire.

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

Chunks falling off the Perito Moreno glacier in Santa Cruz, Argentina.

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

Low-level view of flood water flowing along suburban street at night with house and telephone box in background and moonlight reflecting on the water

Airview slowly travelling over solitary piece of ice in expanse of water in sea in Antarctica, larger ice floes can be seen in distance

Close view of No Entry road sign sticking out of water in flooded street with rubbish debris floating on surface

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

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

Airview slowly travelling over sea in Antarctica covered with pieces of melted ice and sunlight reflecting on water

Russia: A large satellite dish against cloudy sky, camera pans to show a helicopter landing on tundra next to a snowy mountain.

Tracking shot moving along calm water of fjord in Hinlopen past melting icebergs with views through natural arches and bare mountains in background

Close up of row of dripping icicles hanging down on melting iceberg in Greenland in the Arctic Circle

Tracking shot passing broken lumps of melting ice in the ocean in Greenland in the Arctic Circle, with shadow of boat mast seen on the ice

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

Sequence of shots showing traffic along motorway/freeway in America travelling in lines towards camera

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

Close shot of a pair of female feet running across street in heavy rain at night

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

Close view of fire burning amongst trees in forest seen through heat haze

Tracking shot travelling slowly through water in Antarctica at dusk, passing scattered fragments of ice of various sizes in dark water, some ice fragments reflecting sunlight on them

Tracking shot passing ice floes and small iceberg floating in the sea in Greenland in the Arctic Circle with sun sparkling in sky

Tracking shot passing large darkened iceberg in distance with expanse of water and a few pieces of floating ice seen in foreground, in Antarctica

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

Aerial of stranded white truck in flowing flood waters

General view of small weather station building with large satellite dish and telegraph poles along horizon of snowy Arctic landscape, with bright almost starburst sun shining in sky and small ridges of snow in foreground

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