Gulparai, 12, (L) smokes heroin along side her mother Sabera and brother Zaher, 14, (R) August 27, 2007 in Kabul, Afghanistan. (Photo by Paula Bronstein/Getty Images)

In this photo taken Wednesday, March 8, 2017, a woman herder sits with her goats in a remote desert area near Bandar Beyla in Somalia's semiautonomous northeastern state of Puntland. Somalia has declared the drought a national disaster, part of what the United Nations calls the largest humanitarian crisis since the world body was founded in 1945, and with animals being central to many the drought threatens their main sources of nutrition and survival. (Photo by Ben Curtis/AP Photo)

Global wildlife populations will decline by 67% by 2020 unless urgent action is taken to reduce human impact on species and ecosystems, warns the biennial Living Planet Index report from WWF (World Wide Fund for Nature) and ZSL (Zoological Society of London). From elephants to eels, here are some of the wildlife populations most affected by human activity. Here: The maned wolf is among the large mammals in the Brazilian Cerrado that are threatened by the increasing conversion of grasslands into farmland for grazing and growing crops. (Photo by Ben Cranke/Nature Picture Library/Alamy Stock Photo)

A swimming pig off the island of Big Major Cay, in the central Bahamas. These amazing pigs swim every day in the crystal clear waters of the Bahamas. They show off their piggy-paddle to visitors who flock to their beach to see the extraordinary site of wild pigs making a splash in the beautiful turquoise sea.

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Celebrities including singer Nicole Scherzinger and actor Simon Pegg have been snapped by top photographer Rankin for an Oxfam campaign. All in all, a dozen well-known faces have been captured in various poses to highlight the charity's Lift Lives for Good campaign. The fundraising drive, launched at the start of the year, aims to shine a light on the work done by the charity to help poor people around the world. Photo: Undated handout photo issued by Oxfam of Caroline Flack who took part in a photo shoot with top photographer Rankin for Oxfam's Lift Lives for Good campaign. (Photo by Rankin/PA Wire)

(L-R) Mollie King and Frankie Sandford of The Saturdays performs for a dress rehearsal before the first night of their “All Fired Up!” tour at The Bournemouth International Centre on December 1, 2011 in Bournemouth, United Kingdom. (Photo by Dave J. Hogan/Getty Images)

Osama bin Laden lookalike Ceara Francisco Helder Braga Fernandes laughs while chatting on the phone in his “Bar do Bin Laden” on April 29, 2014 in Sao Paulo, Brazil. Braga says he was known as the “Beard Man” before 9/11 but became known as a Bin Laden lookalike following the 9/11 attacks. He says he is Christian and continues to play the role to support his business. (Photo by Mario Tama/Getty Images)