El Cable Ingles raised railway line, built between 1902 and 1904 for iron ore export, Almeria city, Andalusia, Spain, Europe

Parabolic discs at the solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, Europe

C17 transport plane and ground support at RAF Brize Norton in Oxfordshire, United Kingdom

Chinese trying to combat desertification by planting millions of trees, but sadly many die as the ground is now just too dry to support them, Inner Mongolia, Northern China, Asia

Chinese trying to combat desertification by planting millions of trees, but sadly many die as the ground is now just too dry to support them, Inner Mongolia, Northern China, Asia

Chinese trying to combat desertification by planting millions of trees, but sadly many die as the ground is now just too dry to support them, Inner Mongolia, Northern China, Asia

Disabled people lying on the floor meditating together holding hands and closing eyes

A mountain rescue technician is exiting a helicopter high above the ground. A winchman is ready to lower him down to the glacier where a climber is injured in a fall.

South of Delta Junction, Alaska. The supports are filled with anhydrous ammonia. In winter when temperatures drop below about minus 10C the ammonia above the ground turns to liquid and draws the heat from the ground and condenses.

South of Delta Junction, Alaska. The supports are filled with anhydrous ammonia. In winter when temperatures drop below about minus 10C the ammonia above the ground turns to liquid and draws the heat from the ground and condenses.

A mountain rescue emergency physician is hanging below a helicopter high above the ground. A injured hiker is being winched up. The Swiss Alps in the background.

Trans-Alaska Pipeline, Interior Alaska in summertime; Fairbanks, Alaska, United States of America

Trans-Alaska Pipeline, Interior Alaska in summertime; Fairbanks, Alaska, United States of America