Tui De Roy / Blue-footed booby (Sula nebouxii) landing. Punta Vicente Roca, Isabela Island, Galapagos.

David Fleetham / Great white shark (Carcharodon carcharias) breaking surface with mouth open. Guadalupe Island, Mexico.

David Tipling / Pink-footed geese (Anser brachyrhynchus) flying against strong northerly wind off Salthouse North Norfolk, wind turbines in sea in background, England, UK. November

Juergen Freund / Wide angle shot of Barron Falls after a cyclone, showing increased flow of water, Wet Tropics World Heritage Area, Cape Tribulation, North Queensland, Australia. 2017.

Juergen Freund / Close-up of Barron Falls after a cyclone, showing increased flow of water, Wet Tropics World Heritage Area, Cape Tribulation, North Queensland, Australia. 2017.

Ashley Cooper / Sunflower next to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. May 2011

Ashley Cooper / Heliostats, large reflective mirrors directing sunlight to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. June 2011

Ashley Cooper / Sun rays reflected onto solar tower at Ivanpah Solar Thermal Power Plant, the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 megawatts (MW) of electricity....

Ashley Cooper / Wind turbine with stacks of coal fired power station in Amsterdam, Netherlands. May 2013

Alex Mustard / Wave breaking over the rubble zone close to the reef crest of a coral reef. Baa Atoll, Maldives. Indian Ocean.

Espen Bergersen / Humpback whale (Megaptera novaeangliae) breaching above surface, Kvaloya, Troms, Norway November

Nick Hawkins / Minke whale (Baelanoptera acutorostrata) breaching, Bay of Fundy, New Brunswick, Canada, July.