A kayaker circles a small island on Pontoosuc Lake in Pittsfield, Mass., on April 16, 2017. (Photo by Ben Garver/The Berkshire Eagle via AP Photo)





In this never before published photo, Christina Mittermeier captures the serious issue of water scarcity in a unique way. Colorful laundry contrasts the stark browns of a desiccated Madagascar riverbed as two emaciated cows continue their search for water. The image is a reminder of the daily competition for life-sustaining resources in many parts of the world. (Photo by Cristina Mittermeier/National Geographic Creative)





Flowers bloom at the Sui and Tang Dynasties Relics Botanic Garden in Luoyang, central China's Henan Province on March 20, 2017. (Photo by SIPA Asia/Rex Features/Shutterstock)





A picture taken with a slow shutter speed shows Nepalese devotees pull a giant wooden chariot during celebrations of the Rato Machhindranath or Rain God festival in Lalitpur, near Kathamandu, Nepal, 05 May 2017. The Hindus and Buddhists of the Newar community in Patan celebrate the Ratomachindranath festival by pulling a 32-feet high wooden chariot all over the valley for a month. The festival is celebrated in the hope of a good harvest, prosperity and good luck, for upcoming year. (Photo by Narendra Shrestha/EPA)





A field of tulips near the village of East Winch, Norfolk, UK on April 11, 2017. The tulips are grown across more than 100 acres of fields in Blackborough End and are harvested for their bulbs rather than heads which are thrown away. (Photo by Steve Parsons/PA Wire)





Aerial view of the Titanic replica under construction on May 9, 2017 in Suining, Sichuan Province of China. The full-size replica of sunken cruise ship Titanic was built from the end of 2016 in Suining, Sichuan. (Photo by Zhang Zhi/Chengdu Economic Daily/VCG via Getty Images)





Bosphorus strait and the Fatih Sultan Mehmet bridge are pictured through the window of a passenger aircraft over Istanbul, Turkey, Turkey, March 24, 2017. (Photo by Murad Sezer/Reuters)





Snowy white pelicans feed in a nutrient-rich canal of the Mississippi River delta, an ecosystem that is under threat from both climate change and damage caused by the oil and gas companies. This image has been highlighted in several of our more popular books including our 2010 publication, “Great Migrations”, and our 2002 publication, “Women Photographers”. (Photo by Annie Griffiths/National Geographic Creative)





Women wearing cheongsam pose for pictures on a walkway along a cliff during an event in Chongqing Municipality, China March 26, 2017. (Photo by Reuters/Stringer)





In this aerial image, approximately 30,000 cherry blossoms are in bloom at Mt. Yoshino on April 16, 2017 in Yoshino, Nara, Japan. (Photo by The Asahi Shimbun via Getty Images)





This aerial picture taken on April 13, 2017 shows the word “HELP” formed by a farmer in his wheat field in Athee-sur-Cher near Tours, central France, to denounce the crisis in France's agricultural sector. (Photo by Guillaume Souvant/AFP Photo)





Red deer are seen near the headstream of the Yangtze River in Yushu, Qinghai Province, China April 5, 2017. (Photo by Reuters/Stringer)





Aerial view of dragon boat teams preparing for the dragon boat race on the Fujiang River on May 4, 2017 in Suining, Sichuan Province of China. 34 dragon boat teams will participate in the upcoming dragon boat race held on May 30. The last dragon boat race held by Shehong County can be traced back to 1985. (Photo by VCG/VCG via Getty Images)





Cherry blossom is seen along a road in Gui'an new district, Guizhou province, China, March 27, 2017. (Photo by Reuters/China Daily)





An aerial view on tulip fields of the Keukenhof in full bloom, in Lisse, the Netherlands, 19 April 2017. (Photo by Jerry Lampen/EPA)





Anti-frost candles burn in a vineyard in the middle of the Swiss Alps, in Saxon, Canton of Valais, Switzerland, Thursday, April 20, 2017. Due to unusually low temperatures wine growers try to protect their grape shoots with anti-frost candles. (Photo by Valentin Flauraud/Keystone via AP Photo)





This unpublished photo by Pete McBride highlights the stunning Pjorsa River delta in Iceland at the precise point where it meets the Atlantic Ocean. McBride is known not only for his jaw-dropping aerial photography but for his focus on issues facing freshwater ecosystems. (Photo by Peter McBride/National Geographic Creative)





In this June 29, 2016 file photo, boats docked at Central Marine in Stuart, Fla., are surrounded by blue green algae. The 153-mile-long Indian River Lagoon has been plagued by harmful algae blooms. Water quality testing data analyzed by the AP showed the average phosphorous level – a byproduct of fertilizers and human waste that algae thrive on, rose nearly 75 percent between 2000 and 2016. (Photo by Greg Lovett/The Palm Beach Post via AP Photo)