Elena, 7, left, plays a game of checkers using soda bottle tops with friend Hailemariam, 12, at a reception and day center for displaced Tigrayans in Mekele, in the Tigray region of northern Ethiopia, Sunday, May 9, 2021. The Tigray conflict has displaced more than 1 million people, the International Organization for Migration reported in April, and the numbers continue to rise. Some thousands of Eritrean refugees are among the most vulnerable groups in the Tigray conflict and are increasingly caught in the middle of the conflict in Ethiopia’s Tigray region. (Photo by Ben Curtis/AP Photo)





Pupils (left to right) Mia Smith and Vuyo Mdlalose from class 5B at Forthill Primary school in Dundee, eastern Scotland with the trophy on Thursday, July 15, 2021, as their class is unveiled as this year's winners of Beano's “Britain's Funniest Class” national joke competition. (Photo by Euan Cherry/PA Wire Press Association)





A boy helps his parents collect lotus flowers to sell in the market in Krasaing Chrum village on the outskirts of Phnom Penh, Cambodia, Thursday, July 22, 2021. (Photo by Heng Sinith/AP Photo)





Children play on a water pump in an internally displaced camp in Gaoa, Burkina Faso, April 22, 2021. Until recently life was peaceful in western Burkina Faso's Comoe province, but an increase in attacks by extremist groups in the country's west has put the military on edge. Burkina Faso is experiencing an increase in extremist violence by groups linked to al-Qaida and the Islamic State. (Photo by Sam Mednick/AP Photo)





A girl poses for a photo in Port-au-Prince, Haiti on July 17, 2021. (Photo by Ricardo Arduengo/Reuters)





Kid boxers watch a video on a mobile phone together after a training session at the boxing gym in Adura playground, in Lagos, Nigeria on June 5, 2021. (Photo by Temilade Adelaja/Reuters)





A girl practices at the “Lumina Cirkum” circus training space, in Atizapan de Zaragoza, Mexico State, on July 13, 2021. Children hang from hoops while aspiring acrobats balance on tightropes or spin in the air at a family circus school in Mexico, determined to keep their dreams alive despite the pandemic. (Photo by Claudio Cruz/AFP Photo)





A boy jumps into the river Treska during a hot day, near Skopje, Republic of North Macedonia, 15 July 2021. A heat wave with temperatures around 40 degrees Celsius hit North Macedonia and the region. (Photo by Georgi Licovski/EPA/EFE)





Palestinians attend special prayer on the first day of Muslim Eid Al Adha or “Festival of the Sacrifice” in Gaza city on July 20, 2021. (Photo by Majdi Fathi/NurPhoto/EPA/EFE/Rex Features/Shutterstock)





A child wades through flood water after heavy rain in the residential area of Ajun on the outskirts of Banda Aceh on July 9, 2021. (Photo by Chaideer Mahyuddin/AFP Photo)





Kids play in water to cool off during the scorching weather of a heatwave at a River Landing splash park in Saskatoon, Saskatchewan, Canada July 2, 2021. (Photo by David Stobbe/Reuters)





Children take part in unionist Twelfth celebrations in Belfast, Northern Ireland, July 12, 2021. (Photo by Jason Cairnduf/Reuters)





A girl carries a container with water from a nearby stream in Port-au-Prince, Haiti on July 17, 2021. (Photo by Ricardo Arduengo/Reuters)





A boy jumps in the water on Batroun beach in Batroun village, north of Beirut, Lebanon, Friday, July 2, 2021. (Photo by Hassan Ammar/AP Photo)





Sri Lankan children sits on tree branches as they access their online lessons from a forest reserve in their village in Bibila, Sri Lanka, July 2, 2021. Climbing rocks and sitting on tree tops is not part of their curriculum but children in villages surrounding the capital city are doing just that to be able to catch mobile signals to access their online classes. The digital divide fueled by uneven internet access and high data cost has forced many students out of the formal education system in Sri Lanka. (Photo by Eranga Jayawardena/AP Photo)





A man receives a shot of Russia's Sputnik V vaccine against COVID-19 disease at a vaccination center in Gostinny Dvor, a huge exhibition place in Moscow, Russia, 15 July 2021. More than 500,000 Muscovites received the first component of the coronavirus vaccine in a week. Moscow being the epicentre of the new outbreak of the infections by the new Delta variant. Moscow authorities imposed a ban to serve people without QR-codes confirming vaccination against Covid-19 at public waterings, including people recovering from coronavirus Covid-19 disease within six months before the visit, or negative PCR test taken no earlier than 72 hours before the visit. More than 5,000 cases of COVID-19 were detected in Moscow, 32 per cent more than the day before. (Photo by Maxim Shipenkov/EPA/EFE)





A young boy comes face-to-face with a penguin while try to beat the heat at the Calgary Zoo in Calgary, Alberta, Wednesday, June 30, 2021. Environment Canada warns the torrid heat wave that has settled over much of Western Canada won't lift for days. (Photo by Jeff McIntosh/The Canadian Press via AP Photo)





Children cool off in a public fountain in Vilnius, Lithuania, Thursday, July 15, 2021. The heat wave continues in Lithuania as temperature rise to as high as 32 degrees Celsius (89.6 degrees Fahrenheit). (Photo by Mindaugas Kulbis/AP Photo)





4-year-old Nina Gomes, who was named as the youngest “Green Agent” by the Municipal Urban Cleaning Company (COMLURB), prepares to enter the sea to collect garbage in the Praia Vermelha beach in Rio de Janeiro, Brazil on July 9, 2021. (Photo by Pilar Olivares/Reuters)





Yoga enthusiasts take part in a class in honor of victims of the coronavirus disease (COVID-19), at the Samalayuca dunes on the outskirts of Ciudad Juarez, Mexico on July 3, 2021. (Photo by Jose Luis Gonzalez/Reuters)