In this picture taken Thursday December 12, 2019, a group of Syrian refugees walk their way under a blizzard as they attempt to enter the EU through Croatia in the mountains surrounding the town of Bihac, northwestern Bosnia. (Photo by Manu Brabo/AP Photo)





An Iranian girl walks at the Tochal ski resort, in north of Tehran, Iran on December 12, 2019. (Photo by Nazanin Tabatabaee/WANA via Reuters)





A sculpture of boxers is seen at an abandoned pioneer camp in the village of Chernoluchye in Omsk region, Russia on December 11, 2019. (Photo by Alexey Malgavko/Reuters)





A man walks by trees with an autumn colour in a park in Tervuren, near Brussels, Belgium on November 12, 2019. (Photo by Francois Lenoir/Reuters)





A runner dressed as Santa Claus walks through the forest while joining the annual “Roast Goose Digestion Run” aiming to burn the calories after holiday celebrations in Berlin, Germany December 26, 2019. (Photo by Michele Tantussi/Reuters)





Visitors take pictures before dry cliffs following a prolonged drought at Victoria Falls, Zimbabwe, December 4, 2019. (Photo by Mike Hutchings/Reuters)





Autumn colours reflected in the water at Buttermere in the Lake District, Cumbria, England on October 21, 2019. (Photo by Owen Humphreys/PA Images via Getty Images)





A man squats on the Bastei rock in the Saxon Switzerland National Park on October 7, 2019 and photographs the sunrise. (Photo by Sebastian Kahnert/dpa-Zentralbild/dpa via AFP Photo)





A woman walks with her dog in park during autumn day in Sofia, Bulgaria, 15 November 2019. The hot weather temperatures continue in the re​gion. Many parts of the country are still experiencing 22 Celsius degrees. (Photo by Vassil Donev/EPA/EFE)





A kayaker paddles through morning mist on Pigeon Lake in Kawartha Lakes in central Ontario on Tuesday September 17, 2019. (Photo by Fred Thornhill/The Canadian Press via AP Photo)





In this February 19, 2019 photo, scientists hike during a mission to study how temperatures and plant life are changing in the Andean ecosystem known as the paramos – a mist-covered mountain grassland that lies between the top of the treeline and the bottom of the Humboldt glacier, in Merida, Venezuela. The team of scientists in Venezuela is trying to weather the political and economic crisis engulfing their country to record what happens as Venezuela's last glacier vanishes. (Photo by Rodrigo Abd/AP Photo)





Hunter Peter Marugg and dog Fjura are on the hunt for chamois, pictured in the second of the three week long hunting season, 20 September 2019 in Klosters, Switzerland. 69 year old Peter Marugg hunts since 1970. Hunting has a long standing tradition in the canton of Graubuenden. Approximately 5500 hunters participate. (Photo by Gian Ehrenzeller/EPA/EFE/Rex Features/Shutterstock)





Women pose in a park during an autumn day in Prague, Czech Republic on October 20, 2019. (Photo by David W. Cerny/Reuters)





Trekkers look through fog as it covers landscape at Mount Kupe in Seydisehir district of Konya, Turkey on December 9, 2019. (Photo by Fahri Kubilay/Anadolu Agency via Getty Images)





A man takes a photo of frozen trees as a winter storm brings havoc to New Jersey as ice caused power outages and downed trees throughout the area on December 18, 2019 in West Orange, New Jersey. A handful of people braved the cold to take pictures and enjoy the scene at The Waterfront at South Mountain Recreation Complex. (Photo by Rick Loomis/Getty Images)