Children stand in a boat at the banks of the polluted Yamuna River during a dust haze as they wait to give a ride to worshippers in New Delhi during World Environment Day June 5, 2010. (Photo by Reinhard Krause/Reuters)

Baka pygmies in their forest home preparing food in, Sangha Forest, Central African Republic, February 2016. Here, in their forest home, traditional life continues in the face of multiplying challenges ranging from poachers, to ill health. Deep in the rainforests of central Africa lives one of the world’s most mysterious tribes. (Photo by Susan Schulman/Barcroft Images)

Aerial photography platform SkyPixel received 27,000 entries to its 2016 competition. Here are the winning shots plus some of our favourites. Here: Dam near perfect. Second prize in the same category was of the Huia Dam in Auckland, New Zealand. Hong Kong-based SkyPixel was launched in 2014. (Photo by Brendon Dixon/SkyPixel)

These stunning images document the everyday lives of the men, women and children of the Mentawai tribe. The Mentawai people, a native population in Indonesia, are famous for their decorative tattoos and for living a semi-nomadic life on the Mentawai Islands in West Sumatra. Shot by professional photographer Mohammed Saleh Bin Dollah, the series captures a glimpse of life on the island as the Mentawai men smoke and hunt for food and the children play in the river. Here: A young boy helps a woman to prepare food taken on July 19, 2014 on the Mentawai Islands, Indonesia. (Photo by Muhamad Saleh Dollah/Barcroft Media)

“Festive preparation”. Baghnapara, Bardhaman, West Bengal, India. Two girls prepare for the Gajan festival. They will perform a play based on Indian mythology. (Photo by Krishnasis Ghosh)

An adult specimen of Nannospalax (leucodon) montanosyrmiensis, a variant of the lesser mole-rat (Spalax leucodon) is pictured near Albertirsa, some 60 kilometers southeast of Budapest, Hungary, 12 May 2018. The critically endangered rodent lives in several isolated populations in the Carpathian Basin. (Photo by Sandor Ujvari/EPA/EFE)

Myanmar T-72 battle tank competes in an individual race of the Tank Biathlon competition as part of the 7th International Army Games 2021 at the Alabino training ground, Moscow region, Russia, 27 August 2021. The 7th International Military-Technical Forum “Army-2021” is held from 22 August till 04 September 2021 at 23 military training grounds of 11 countries. Five thousand participants of 277 teams from 42 countries compete in 34 military contests. (Photo by Sergei Ilnitsky/EPA/EFE)

Suffering from a broken nose and bruised ribs Natasha Dzhuley, 16, relaxes after inhaling glue for the first time – something she swore she would never do, 2002. She was beaten by her pimps men in what Ruslana believes was a warning to other prostitutes to stay in line. Though another child believes her pimp had her beaten because she was pregnant. Less than a week after this picture of Natasha was taken she was dragged away by six men. She has not been heard or seen since. (Photo by Kurt Vinion /Getty Images)