Israel: Men in period uniform on horseback re-enact the WWI Cavalry Charge.

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

Senegal, Africa: Back shot of a woman washing laundry in a poor, rural region of Senegal.

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

Israel: Back shot of men in period uniform on horseback riding across dusty ground as they re-enact the WWI Cavalry Charge.

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

Close view of stream of black smoke puffing and belching upwards

Mid shot of a factory chimney seen through clouds of thick, white smoke. Zoom out to reveal several chimneys and factory buildings.

High-angled shot of lorries/trucks carrying coal along very dusty road in China

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.

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

An unidentified person shovelling up oily sand on a beach.

Wide shot of blue sky and clouds. Camera tilts downwards to show brown smoke rising from factory chimneys and turning the sky yellow.

A blue sky and white sun peek through shrouding white smoke rising from chimney smokestacks. Camera pans to reveal urban landscape on a sunny day.

Israel: Men in period uniform on horseback ride across dusty ground as they re-enact the WWI Cavalry Charge.

Wide shot of silhouetted factory chimneys churning out grey smoke into sky, with clouds, smoke and bursts of sunshine, in Quebec.

A dog sniffs around a sewage site in a shantytown on the edge of a river in Argentina.

Clouds of smoke billow from a furnace in a smelting operation in Norilsk, Russia. Sunshine and blue sky in background.

Oily waves washing up onto the sand on a beach in Taean, South Korea.

USA: Various shots of a coal-fired power plant emitting smoke from large chimneys, huge clouds of white smoke drifting with sunlight shining through, wide view of power plant seen from across the river.

Aerial shot of cloudy oil-stained water beside the coast.