Cyril Ruoso / Oilseed rape (Brassica napus) fields in flower, Burgundy, France, May.

Cyril Ruoso / Pollution washed up in mangroves, Sungei Buloh Natural Park, Singapore. Non-ex

Kevin Schafer / Oil refinery with Mount Baker behind, seen from Fidalgo Bay, Anacortes, Washington

Kevin Schafer / Oil refinery at sunrise spewing gas effluence out of smoke stacks, Anacortes, Washington

Bryan and Cherry Alexander / Oil storage tanks near Sabetta, South Tambey Gas field, Yamal, Siberia, Russia. February 2014.

Jean E. Roche / Flooded petrol station in Arles city flooded by the Rhone in December 2003. Camargue, France.

Gary K. Smith / Marsh harrier (Circus aeruginosus) adult female circling over Oilseed rape crop, Norfolk, England, May. Digital composite.

Tom Gilks / Tanzanian boys doing homework using oil lamp, Tanzania.

Cheryl-Samantha Owen / African penguin; (Spheniscus demersus); Rehabilitation at Southern African Foundation for the Conservation of Coastal Birds (SANCCOB); Cape Town; South Africa.

Michael Pitts,Michael Pitts / Engine room ventilator shafts of oil tanker 'Seiko Maru'. Sunk in Chuuk Lagoon 17/18th February 1944, Chuuk Lagoon, Pacific

Jabruson / Old abandoned Oil Palm trees (Elaeis guineensis), on the edge of plantation limits, at the edge of Korup National Park, South West Cameroon.

Denis-Huot / Bottlenose dolphin (Tursiops truncatus) playing in the waves of an oil tanker, Port Aransas, Texas, USA