A farmer and his cow “Cilly” wait for results of the “Milchgipfel” (lit. Milk summit) which takes place at the German Ministry of Food and Agriculture in Berlin, Germany on May 30, 2016. Minister of Food and Agriculture Christian Schmidt met with representatives of agriculture and dairy farming to evaluate measures to help dairy farmers in light of plummeting milk prices. (Photo by Maurizio Gambarni/EPA)

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)

U.S Army combat camera photographer Spc. Hilda Clayton took this photo July 2, 2013 that was released by the U.S. Army, that shows an Afghan soldier engulfed in flame as a mortar tube explodes during an Afghan National Army live-fire training exercise in Laghman Province, Afghanistan. The accident killed Clayton and four Afghan National Army soldiers. (Photo by Spc. Hilda Clayton/U.S. Army via AP Photo)

A demonstrator is detained by riot police during a protest, in La Paz, Bolivia on November 21, 2019. Bolivia's interim President Jeanine Anez asked Congress Wednesday to approve a law that would allow for new elections, after deadly unrest following the resignation of Evo Morales and the disputed October 20 ballot. (Photo by Marco Bello/Reuters)

Dancers learn choreography they will need to perform as part of an open audition for the 2022 Radio City Rockettes at Radio City Music Hall in New York, New York, USA, 18 April 2022. The open auditions, the first being held since the start of the coronavirus pandemic, were expected to draw nearly 900 dancers competing for one of the few open spots in the 2022 Christmas Spectacular Starring the Radio City Rockettes, a long running holiday show. (Photo by Justin Lane/EPA/EFE)

Liberians stage a rally for justice in front of the Liberia National Police headquarters in Monrovia, Liberia, 12 April 2022. There has been reported rise in mysterious deaths, and mob justice incidents in the country, according to reports. United Voices Against Injustice, an advocacy group, stage a rally to seek proper justice for all the many mysterious deaths, most especially, those alarming ones of recent in Liberia. (Photo by Ahmed Jallanzo/EPA/EFE)

An abortion rights demonstrator covered in fake blood during an “Abortion is Freedom” rally outside the US Supreme Court in Washington, D.C., US, on Monday, July 4, 2022. Last month the Supreme Court overturned the 1973 Roe v. Wade decision and wiped out the constitutional right to abortion, leaving it to individual states to decide whether abortions are allowed. (Photo by Ting Shen/Bloomberg via Getty Images)

A photographer takes pictures near an inflated Master Yoda character hot air balloon during the 33rd annual QuickChek New Jersey Festival of Ballooning at Solberg Airport Friday, July 24, 2015, in Readington, N.J. The festival which runs through Sunday, July 26, 2015, will feature as many as 100 balloons, including many large, shaped balloons of Darth Vader, an American Flag, a giant whale, a Panda Bear, and a baby dinosaur. (Photo by Mel Evans/AP Photo)