Tokyo, Japan: Cars on a factory production assembly line with mechanics welding and building the interior of the car

Tokyo, Japan: Cars on a factory production assembly line with mechanics welding and building the interior of the car

Medicine on a production line in a factory.

Female workers wearing overalls and hairnets working on a chocolate factory production line packing brightly-coloured chocolates into boxes.

Sequence of green bottles moving on conveyor belts in a brewery.

Single smoking factory chimney seen on the horizon in the distance with trail of black smoke emanating over darkened skyline of town rooftops, the smoke passes over bright sun

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

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

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

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

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

Extremely close shot of tips of fingers typing on keyboard

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

Very close shot of female fingers typing on keyboard, one finger is wearing a ring

Large industrial chimney in smoggy surroundings in between two tower blocks

Very close shot of tips of fingers typing on keyboard

Very close shot of fingers typing on keyboard

Close view of tops of two factory chimneys, one belching a stream of black smoke upwards

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

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

General view of two factory chimneys belching smoke in silhouette and factory structure in urban setting against intense orange sky

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

Mid-view of factory chimney giving out bursts of orange flames against cloudy sky

Very bright sun with rays emanating from it against blue sky then camera pulls out to show general view of industrial factory emitting clouds of smoke

General view of line of factory chimneys in silhouette belching black smoke against partially clear sky at sunset

Close view of top of factory chimney belching brown/black smoke with poles and wires crossing the screen in silhouette

General view of factory chimneys in silhouette belching black smoke against yellow sky at sunset

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

Very close shot of female fingers typing on keyboard, one finger is wearing a ring and part of a jumper is seen

Silhouette of factory structures with smoke billowing in centre, seen against large full orange sun low in sky

Clouds of smoke billowing from two long chimneys positioned on left of screen against clear sky with rays of sunlight hitting chimney tops

Close view of tops of two chimneys belching smoke with poles and wires crossing factory structure in silhouette