In this two photo combination picture, the Eiffel Tower with its usual lighting at left, and after the lighting was switched off at right, at the occasion of the Earth Hour, in Paris, France, Saturday March 28, 2015. This Saturday, 28 March 8:30 p.m. local time, individuals, businesses, cities and landmarks around the world are switching off their lights for one hour to focus attention on climate change. (Photo by Remy de la Mauviniere/AP Photo)

John Hawkley and his wife Patty Hawkley stand next to their 2,058 pound pumpkin and celebrate after winning the 41st Annual Safeway World Championship Pumpkin Weigh-Off on October 13, 2014 in Half Moon Bay, California. John Hawkley of Napa, California won the 41st Annual Safeway World Championship Pumpkin Weigh-Off and broke a state record with his gigantic pumpkin weighing in at 2,085 pounds. Hawkley took home a cash prize of $12,510, or $6.00 a pound. (Photo by Justin Sullivan/Getty Images)

Oded Balilty is an Israeli documentary photographer. He is an Associated Press photographer and won the Pulitzer Prize for Breaking News Photography in 2007. Photo: A Jewish settler struggles with an Israeli security officer during clashes that erupted as authorities evacuated the West Bank settlement outpost of Amona, east of the Palestinian town of Ramallah, in this February 1, 2006, file photo. (Photo by Oded Balilty/AP Photo)

Photographer Vincent Jansen travels throughout Europe, visiting beautiful abandoned places. He explores churches, factories, sanatoriums, mortuaries, villas and theaters, all quietly waiting for renovation or demolition. His photos show a unique perspective on what is happening behind the “no trespassing” signs: where nature is slowly gaining ground and the desolation, loneliness and decay leave their stunning traces. Photo: This piano was located in one of many rooms of a huge chateau in Poland. (Photo by Vincent Jansen)

Julian Rodriguez, of Everson, Wash., holds his two-gram packet of recreational marijuana outside Top Shelf Cannabis, Tuesday, July 8, 2014, in Bellingham, Wash., on the first day of legal sales in the state. (Photo by Ted S. Warren/AP Photo)

Merit Prize Winner: “A Well Earned Rest in the Sahara”. This photo of Moussa Macher, our Tuareg guide, was taken at the summit of Tin-Merzouga, the largest dune (or erg) in the Tadrat region of the Sahara desert in southern Algeria. Moussa rested while waiting for us to finish our 45-minute struggle to the top. It only took ten minutes of rolling, running, and jumping to get back down. The Tadrat is part of the Tassili N'Ajjer National Park World Heritage area, famous for its red sand and engravings and rock paintings of cattle, elephants, giraffes, and rhinos that lived there when the climate was milder. Photo location: Summit of Tin-Merzouga, Tadrat, Tassili N'Ajjer National Park, Algeria. (Photo and caption by Evan Cole/National Geographic Photo Contest)

A girl struggles with winds from approaching Typhoon Matmo along the eastern coast of Keelung, northeastern Taiwan, Tuesday, July 22, 2014. (Photo by Wally Santana/AP Photo)