A view is seen from the Amazon Tall Tower Observatory (ATTO) in Sao Sebastiao do Uatuma in the middle of the Amazon forest in Amazonas state January 10, 2015. The Amazon Tall Tower Observatory is a project of Brazil's National Institute of Amazonian Research and Germany's Max Planck Institute and will be equipped with high-tech instruments and an observatory to monitor relationships between the jungle and the atmosphere from next July. According to the institutes, ATTO will gather data on heat, water, carbon gas, winds, cloud formation and weather patterns. Picture taken on January 10, 2015. REUTERS/Bruno Kelly (BRAZIL - Tags: ENVIRONMENT SCIENCE TECHNOLOGY) 

A bird eats a fish surrounded by dead fish on the banks of the Guanabara Bay in Rio de Janeiro February 24, 2015. International Olympic Committee members meeting in Rio de Janeiro this week will understand if its waters are not completely clean for the sailing events in 2016, the state's governor said on Monday. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY) 

Cats crowd the harbour on Aoshima Island in the Ehime prefecture in southern Japan February 25, 2015. An army of cats rules the remote island in southern Japan, curling up in abandoned houses or strutting about in a fishing village that is overrun with felines outnumbering humans six to one. Picture taken February 25, 2015. To match story JAPAN-CATS/ REUTERS/Thomas Peter (JAPAN - Tags: SOCIETY ANIMALS TPX IMAGES OF THE DAY TRAVEL) 

Palestinians herd sheep in the Judean desert between Jericho and Jerusalem February 6, 2015. REUTERS/Ammar Awad (JERUSALEM - Tags: ANIMALS SOCIETY TPX IMAGES OF THE DAY) 

Thousands of starlings fly over marshes as they return to roost at dusk near Glastonbury in Somerset, south west England, January 14, 2015. The daily display at dawn and dusk during winter months, known as 'murmurations', is particularly spectacular in this part of the south west of England and on the England-Scotland border near Gretna. REUTERS/Toby Melville (BRITAIN - Tags: ANIMALS SOCIETY ENVIRONMENT TPX IMAGES OF THE DAY) 

A snowboarder descends from a rough mountain slope towards Balea glaciar lake at Balea Lac resort in the Fagaras mountains January 28, 2015. REUTERS/Radu Sigheti (ROMANIA - Tags: SPORT SNOWBOARDING TRAVEL ENVIRONMENT SOCIETY TPX IMAGES OF THE DAY) 

Snow falls on a flock of flamingos standing on a snow-covered field at a wildlife zoo in Hefei, Anhui province January 29, 2015. REUTERS/Stringer (CHINA - Tags: ANIMALS ENVIRONMENT TPX IMAGES OF THE DAY) 

Huge waves crash on the San Esteban de Pravia seafront in the northern Spanish region of Asturias February 24, 2015. REUTERS/Eloy Alonso (SPAIN - Tags: SOCIETY ENVIRONMENT) 

A partially frozen American Falls in sub freezing temperatures is seen in Niagara Falls, Ontario February 17, 2015. Temperature dropped to 6 degrees Fahrenheit (-14 Celsius) on Tuesday. The National Weather Service has issued Wind Chill Warning in Western New York from midnight Wednesday to Friday. REUTERS/Lindsay DeDario (CANADA - Tags: TRAVEL ENVIRONMENT) 

The glow of the Aurora Borealis, or Northern Lights, is seen in the horizon in the Kawartha Lakes region, southern Ontario February 23, 2015. The colorful cosmic display of the northern lights is rarely seen in Ontario. REUTERS/Fred Thornhill (CANADA - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

A bird flies in front of city sky scrapers covered by fog in the center of Warsaw February 23, 2015. REUTERS/Kacper Pempel (POLAND - Tags: ENVIRONMENT ANIMALS CITYSCAPE) 

A herdsman takes a rest while he drives his goats at a corn field at Dashiwo village, on the outskirts of Beijing January 26, 2015. The Chinese Lunar New Year on February 19 will welcome the Year of the Sheep (also known as the Year of the Goat or Ram). Picture taken January 26, 2015. REUTERS/Kim Kyung-Hoon (CHINA - Tags: SOCIETY ANNIVERSARY ANIMALS FOOD ENVIRONMENT TPX IMAGES OF THE DAY) 

Pontoons, which were previously used as a floating jetty, are seen on the cracked ground of the Atibainha dam, part of the Cantareira reservoir, during a drought in Nazare Paulista, Sao Paulo state February 12, 2015. Brazil's worst drought in 80 years has left the Cantareira system, that provides greater Sao Paulo with most of its water, with the lowest water level on record. Brazil's economy is already expected to post zero growth this year. Worse yet, since Brazil depends on hydroelectric dams for about three quarters of its electricity, power shortages are also possible due to the drought, federal officials have said. REUTERS/Paulo Whitaker (BRAZIL - Tags: ENVIRONMENT DISASTER TPX IMAGES OF THE DAY) 

A man walks past an ice-covered tree along Lake Michigan in Chicago, Illinois, February 2, 2015. A huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week, after leaving more than a foot (30 cm) of snow in the Chicago area. The area was hit with blizzard conditions yesterday, which was followed by a huge temperature drop to well below freezing. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

Migrating starlings fly in formation across the sky near the southern Israeli town of Rahat February 2, 2015. The phenomenon known murmuration is most common during the winter months. REUTERS/Nir Elias (ISRAEL - Tags: ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY) 

Swans swim over a lake, with the air temperature at about minus 35 degrees Celsius (minus 31 degrees Fahrenheit) as steam ascends above the water during sunset near the village of Urozhainy, Sovetsky district of Altai region, January 26, 2015. About 600 swans annually migrate to the lake, which is heated by warm springs, where they spend their winter being fed by yagers, which help them to survive the severe cold. Picture taken January 26, 2015. REUTERS/Andrei Kasprishin (RUSSIA - Tags: ANIMALS ENVIRONMENT) 

Afghan survivors of an avalanche walk in the Abdullah Khil village of the Dara district of Panjshir province March 1, 2015. More than 180 people have been killed in north Afghanistan in some of the worst avalanches there for 30 years, officials said on Thursday, with heavy snow set to last for two more days after an unusually dry winter led to fears of drought. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

People walk on the flooded St. Mark's Square during a period of seasonal high water and on the first day of carnival, in Venice February 1, 2015. REUTERS/Stefano Rellandini (ITALY - Tags: TRAVEL ENVIRONMENT SOCIETY TPX IMAGES OF THE DAY) 

Swans swim over a lake, with the air temperature at about minus 35 degrees Celsius (minus 31 degrees Fahrenheit) as steam ascends above the water during sunset near the village of Urozhainy, Sovetsky district of Altai region, January 26, 2015. About 600 swans annually migrate to the lake, which is heated by warm springs, where they spend their winter being fed by yagers, which help them to survive the severe cold. Picture taken January 26, 2015. REUTERS/Andrei Kasprishin (RUSSIA - Tags: ANIMALS ENVIRONMENT TPX IMAGES OF THE DAY) 

The sunset illuminates the peaks of the mountains near the Swiss mountain resort of St. Moritz January 24, 2015. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SOCIETY ENVIRONMENT TRAVEL TPX IMAGES OF THE DAY) 

Cattle graze at the Great Hungarian Plain in Hortobagy, east of Budapest late September 25, 2014. Picture taken September 25, 2014. REUTERS/Laszlo Balogh (HUNGARY - Tags: AGRICULTURE ANIMALS TPX IMAGES OF THE DAY) 

A man rides his bike up Beacon Street during a blizzard in Boston, Massachusetts January 27, 2015. A blizzard swept across the northeastern United States on Tuesday, dropping more than a foot (30 cm) of snow across Massachusetts and Connecticut. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY)