Ashley Cooper / Setting the central heating thermostat at a cooler temperature to save energy.
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Ashley Cooper / Control room hall of Krafla geothermal power station, which produces electricity as well as supplying hot water to heat buildings in the surrounding area. September 2010.
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Staffan Widstrand / Mid winter colours in -39 degrees C, in the Luxury suite, on a polar bear fur, at the Icehotel, in Jukkasjarvi, Lapland, Laponia, Norrbotten county, Sweden
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Pal Hermansen / Main storage room of Svalbard Global Seed Vault where approximately 800,000 seeds are stored at -18 C, Svalbard, Norway, July 2012.
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Yves Lanceau / Labrador Retriever, yellow dog lying in doorway in cool of room behind bead curtain, France
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Nick Upton / Broad-bodied chaser dragonfly (Libellula depressa) male sunning on a marginal plant stem in a garden pond, Wiltshire, UK, May.