Guy Edwardes / Doorway in abandoned cottage, Isle of Harris, Outer Hebrides, Scotland, UK. March 2014.

Guy Edwardes / Stove in abandoned cottage, Isle of Harris, Outer Hebrides, Scotland, UK. March 2014.

Georgette Douwma / Stove-pipe sponge (Aplysina archeri) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Georgette Douwma / Stove-pipe sponge (Aplysina archeri) and Orange elephant ear sponge (Agelas clathrodes) Bonaire, Netherlands Antilles, Caribbean, Atlantic Ocean.

Sandesh Kadur / An elderly Toda woman sits inside her hut preparing a meal of raagi on a traditional wood-burning stove. Todas are strict vegetarians and their diet consists largely of plant and milk products. Wester...

Peter Scoones / Stove pipe sponge (Aplysina archeri) Caribbean photographed during making of BBC Planet Earth series 2005

Constantinos Petrinos / Stove Pipe sponge {Aplysina archeri} Bonaire, Caribbean

Ashley Cooper / People displaced by flooding at Chiteskesa refugee camp, cooking on a fuel efficient stove. near Mulanje, Malawi. March 2015.

Ashley Cooper / Log burner used to heat a house

Ashley Cooper / Traditional kitchen stove in a peasant farmers house in northern China. March 2009. The main fuel for the stove is dried maize stalks which is renewable and has a zero carbon footprint. The stove is a...

David Fleetham / Brittle star (Ophiothrix suesonii) on Stove Pipe Sponge (Aplysina archeri). Bonaire, Netherland Antilles, Caribbean.

Jen Guyton / Traditional homestead with a stone hut and wood-fired stove. Lesotho, southern Africa,