Sand dunes in Sahara Desert, Morocco, North Africa

Drought in Burkina Faso (formerly Upper Volta). A white Land Rover 4-wheel drive vehicle drives past a dried out carcass.

Mothers and children sitting on mats while waiting at Gorom Gorom Hospital in Burkina Faso (formerly Upper Volta)

A veiled native woman walking alone along a dusty road in Burkina Faso (formerly Upper Volta)

Drought scene - two men walking past the dried out carcasses of dead cattle in Burkina Faso (formerly Upper Volta)

Cheetas scent marking their territory, Moremi, Botswana, Southern Africa

Earth of ploughed field, Wyck Rissington, Gloucestershire, United Kingdom

Villagers gather for a funeral in the desert in Burkina Faso (formerly Upper Volta)

Earth of ploughed field, Wyck Rissington, Gloucestershire, United Kingdom

Dried earth and potato crops, Holkham, Norfolk, United Kingdom

Dried sand and mud in desert