Hungary: Man digs shovels earth from inside a massive hole which reaches above his head, another man uses a pickaxe to find mine coal.

Hungary: Man shovels large chunks of coal into a metal stove inside a stone building

Texas, USA. Cattle grazing in a grassy field with a 'nodding donkey' oil pump in operation in the background.

USA. A 'nodding donkey' oil pump in operation surrounded by leafy trees. Heat creates a visible haze effect in the air.

USA. Medium close up view of a rusted 'nodding donkey' oil pump in operation.

USA. Close-up view of a 'nodding donkey' oil pump in operation framed against a blue sky.

Barrow Island, Australia. A 'nodding donkey' oil pump silhouetted against the setting sun. A golden glow fills the frame.

A 'nodding donkey' oil pump in operation viewed through leafless twigs in Texas, USA.

Barrow Island, Australia. A 'nodding donkey' oil pump silhouetted against the setting sun. Clouds creep across the sun's face.

Barrow Island, Australia. A 'nodding donkey' oil pump silhouetted against the setting sun. Clouds creep across the sun's face.

Siberia, Russia: Oil wells and pumps at Yukos Oil's main operation unit 'Yuganskneftegaz'

USA. Wide view of 'nodding donkey' oil pumps operating in a green oil field.

USA. A 'nodding donkey' oil pump in operation surrounded by palm trees.

Barrow Island, Australia. Low-angle view of a 'nodding donkey' oil pump operating against a blue sky background.

Close-up view of a 'nodding donkey' oil pump in operation silhouetted against a golden sunset in Texas, USA.

A 'nodding donkey' oil pump in operation silhouetted against a golden sunset in Texas, USA.

USA. View of several large cylindrical oil storage tanks.

Barrow Island, Australia. A 'nodding donkey' oil pump operates on red soil against a blue sky background.

USA. Medium close up view of several 'nodding donkey' oil pumps in operation. Heat creates a visible haze effect in the air.

Barrow Island, Australia. Waste gas burns in bright flames in the foreground while a 'nodding donkey' oil pump operates in the background.

USA. 'Nodding donkey' oil pumps in operation framed against a blue sky.

Barrow Island, Australia. A silhouetted 'nodding donkey' oil pump operates in the background while waste gas burns in a bright flame in the foreground throwing a visible haze effect into the air.

Barrow Island, Australia. A 'nodding donkey' oil pump operates on a grassy plain against a blue sky.

Barrow Island, Australia. A silhouetted 'nodding donkey' oil pump operates in the background while waste gas burns in a bright flame in the foreground throwing a visible haze effect into the air.

Low-angle view of a 'nodding donkey' oil pump in operation framed against a blue sky.

Barrow Island, Australia. A silhouetted 'nodding donkey' oil pump operates in the background while waste gas burns in a bright flame in the foreground throwing a visible haze effect into the air.

Wind turbine on roof of house with fast, rotating and spinning blades against blue sky

Woking, England: Alternative powered street light silhouetted against blue sky and bright sunshine. Solar panels are stretched on both sides of the street light with a wind turbine revolving at the top.

Woking, England: Alternative powered street light with solar panels and a small wind turbine on top, camera zooms in towards the solar panels. An airplane can be seen flying high in the sky in the background.

Louisiana, USA: Close up shot of a pelican sitting in oily water and covered in brown oil residue.

Libya: Various air shots of an RAF Tornado aircraft flying alongside RAF tanker aircraft performing mid-air refuelling operation.

Surrey, England: Wide view of oilseed rape growing in a yellow field with rolling green hills in the background, close up of oilseed rape gently moving in the wind.

Side view of wind farm turbine with rotating blades seen in silhouette against dramatic cloudy sky

Algeria: Processing facilities at 'In Salah Gas' project

West Virginia, USA: Various shots of open-cast coal mine with lumps of coal being scooped up and loaded into trucks and lorries.

South Korea: Various shots of an F-16 Fighter jet being refueled in mid air.

Mexico: Aerial view of boats positioning oil containment booms on the ocean surface

Blyth Harbour Wind Farm, Northumberland, United Kingdom: Aerial view travelling over rotating blades of line of wind turbines surrounded by rough sea on bleak day.

Line of wind farm turbines on hill with rotating blades seen in silhouette against dramatic cloudy sky

Woking, England: A row of alternative powered street lights with solar panels and a wind turbine. Camera zooms towards the environmentally friendly street lights.

Low-angled view of wind farm turbine with rotating blades in silhouette against cloudy sky