Ashley Cooper / Man re-thatching old barn, Symondsbury, Dorset UK, June 2012.

Ashley Cooper / Man re-thatching old barn, Symondsbury, Dorset UK, June 2012.

Cyril Ruoso / A harp is the traditional tool to clean Common eider (Somateria mollissima) down, collected on Lanan Island, Vega archipelago, Norway

Cyril Ruoso / Common eider (Somateria mollissima) close up of down feathers, the quality of the little hooks makes the eiderdown the best insulator, Vega Archipelago, Norway June

Cyril Ruoso / Margit cleaning down from Common eider (Somateria mollissima) with traditional harp tool whilst some dries in the sun, Lanan Island, Vega Archipelago, Norway June

Eric Baccega / Nenet woman at entrance to reindeer fur covered tent. Yar-Sale district. Yamal, Northwest Siberia, Russia. April 2016.

Eric Baccega / Nenet reindeer herders, eating bread, raw reindeer meat and tea inside reindeer skin tent. Yar-Sale district, Yamal, Northwest Siberia, Russia. April 2016.

Peter Cairns / 2020VISION / Close-up of Highland cow (Bos taurus) showing thick insulating hair covering face, Isle of Lewis, Outer Hebrides, Scotland, UK, April.

Peter Cairns / 2020VISION / Close-up of Highland cow (Bos taurus) showing thick insulating hair on top of head, Isle of Lewis, Outer Hebrides, Scotland, UK, April.

Doc White / Kapok Tree (Ceiba pentandra) fruit, its fiber is eight times lighter than cotton and several times more buoyant than cork, extremely insulating as well as being odorless, non-allergic and non-toxic, A...

Ingo Arndt / Muskox (Ovibos moschatus) showing thick insulating coat, Norway

Ingo Arndt / Muskox (Ovibos moschatus) showing thick insulating coat, Norway

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) swimmng and washing their feathers to maintain insulating properties in cold climate, near beaches of Salisbury Plain, South Georgia Island, Southern Ocean, Anta...

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) adults coming ashore flapping wings after swimming and washing their feathers to maintain their insulating qualities, fall, Gold Harbour, South Georgia Island, S...

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) walking out of sea after swimming and cleaning feathers to maintain their insulating qualities, St Andrews Bay, South Georgia Island, Southern Ocean, Antarctic C...

Daniel Gomez / Harvesting bark of Alerce tree {Fitzroya cupressoides} Argentina - bark expands on contact with water and is used to plug the gaps between the planks of boat casks

Ingo Arndt / Muskox (Ovibos moschatus) showing thick insulating coat, Norway

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) adults walking into surf to bathe and clean their feathers to assure insulating properties in cold climate, fall, Southern Ocean, South Georgia Island, Antarctic...

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) walking into sea near rookery to clean their feathers to keep their insulating qualities, Alardyce Range and glaciers in background, fall, St Andrews Bay, South...

Doug Allan / Trans Alaska pipeline with insulated support structure, Fairbanks, Alaska.

Adrian Davies / An 'eco' house roof, covered in grass, Switzerland. June.

Philippe Clement / Building fitted with warm pitched roof insulation by installing insulating sandwich panels, Belgium, March 2019.