Neil Aldridge / Sable antelope (Hippotragus niger) bull charging through the shallows of the Selinda Spillway, with another behind, northern Botswana, August.

Yashpal Rathore / Asiatic elephant (Elephas maximus), female charging, Jim Corbett National Park, India. 2014

Staffan Widstrand / Hippopotamus (Hippopotamus amphibius) bull emerging from water to charge, iSimangaliso Wetland Park, KwaZulu Natal National Park. South Africa. Specially commended in the Animal Portraits category of...

Sharon Heald / Hippopotamus (Hippopotamus amphibius) charging, Chobe National Park, Botswana, July.

Tony Heald / Hippopotamus (Hippopotamus amphibius) charging, Chobe National Park, Botswana, July.

Enrique Lopez-Tapia / Hippopotamus (Hippopotamus amphibius) charging against boat on Lake Chamo. Nechisar National Park. Ethiopia, November 2014

Kristel Richard / A wild Misaki-uma breeding stallion (right) brings back one of his mares to his band while another breeding stallion (left) charges him away, in the Cape Toi Reserve, Miyazaki Prefecture, Kyushu Islan...

David Woodfall / Electric car charging at motorway service station.

David Woodfall / Electric car charging at motorway service station.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) bull charging, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only.

Ashley Cooper / The Brough of Birsay lighthouse marks Orkney mainland's most north westerly tip. It was built in 1925 and converted to solar power in 2002. A bank of 36 solar panels charges an array of batteries that...

Ashley Cooper / Dalit woman / untouchable woman in her hut, illuminated by an electric light, powered by an A4 sized solar panel, that charges a battery, and enables her to have light. Karnataka, India. December 2013