A young humpback whale calf testing out its leaping capabilities, Hawaii, United States of America, Pacific, North America

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Gloucester Old Spot pigs drink from a trough, Gloucestershire, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

A young child washing in a river in the Philippines

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Young woman rides Cleveland Bay cross Thoroughbred horse on Broad Haven Beach, Pembrokeshire, Wales

Male mute swan drinking water, Donnington, Gloucestershire, The Cotswolds, England, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Lone swimmer in the surf at Druidstone Beach near Broad Haven, Pembrokeshire coast , Wales

Young woman rides a bay horse on Broad Haven Beach, Pembrokeshire, Wales, United Kingdom

Lone young elephant drinking at a water hole at dusk, Botswana, Africa

Water sellers in brightly coloured costumes in the Djemma El Fna square in Marrakesh, Morocco

A heron fishing in the Helford Estuary in Cornwall, England, United Kingdom

A pair of turtles on the beach in Cyprus

An eight year old girl and six year ld boy walking ino the sea in France

An eight year old girl running into the sea in France

Man and child on ferry, Delhi, India

Boy washing at handpump, street scene, Delhi, India

Clouds of steam rise as people swim in the Blue Lagoon thermal pool, Iceland

An eight year old girl running out of the sea during a holiday in France

Testing water for arsenic, Bangladesh, Asia

Early morning wash , Delhi, India

Indonesia laboratory testing drinking water. Photograph taken in meulaboh, aceh province -december 2006, 2 years after tsunami of december 26th 2004 devastated much of coastal region. Taken to illustrate reconstruction work projects of (catholic relief services) of sponsored photo tour. terchnician : every house well gets tested. Unicef originally helped up to support other ngos in area, helps staff salaries provides us with equipment. coordinates activities with local government. water in local wells is quite contaminated, especially with arsenic, as well as nitrates, nitrites, iron, manganese fluoride. water became salinated after tsunami. We test here both water from shallow deep wells

A man testing a waterproof jacket under a waterfall in Scotland, United Kingdom, Europe

Hispanic woman dipping toe in swimming pool

Hand wearing latex glove testing water with instrument in lab at UMCP Greenhouse

Viewpoint, looking down at feet standing next to foamy surf on Kamaole Beach at the water's edge, Kihei, Maui, Hawaii, United States of America

A young man walking down a wooden pier, towards calm lake surrounded by mountains in Torres del Paine National Park, Chile, Torres del Paine National Park, Chile.

A young man in mid air, diving off a wooden pier, into calm lake surrounded by mountains in Torres del Paine National Park, Chile, Torres del Paine National Park, Chile.

A young girl in a straw hat and shorts paddling in the shallow waters of a lake

A family, parents and son spending time together by a lake in summer

A young girl in a straw hat and shorts paddling in the shallow waters of a lake

Girls in a row at edge of swimming pool

Woman wrapped in blanket at beach

Teenage girl entering swimming pool

Earth diluted with water in order to extract the PH from the soil as part of a study on nitrogen exchanges between bacteria and the roots of legumes in the tropical forest of the "La Selva" research station in Puerto Viejo from Sarapiqui, Costa Rica

Earth diluted with water in order to extract the PH from the soil as part of a study on nitrogen exchanges between bacteria and the roots of legumes in the tropical forest of the "La Selva" research station in Puerto Viejo from Sarapiqui, Costa Rica