Ethiopians fish on the Awasa lake in Hawassa, Ethiopia, November 22, 2019. REUTERS/Tiksa Negeri

A fisherman is seen during a rainy day at the Rodrigo de Freitas lagoon in Rio de Janeiro, Brazil November 11, 2019. REUTERS/Sergio Moraes

A fisherman is seen during a rainy day at the Rodrigo de Freitas lagoon in Rio de Janeiro, Brazil November 11, 2019. REUTERS/Sergio Moraes

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

The wreck of the Golden Harvest, a fishing vessel that ran aground on the banks of Loch Linnhe in 2011, is seen in front of the UK's highest mountain Ben Nevis near Fort William, Scotland, Britain November 10, 2019. REUTERS/Russell Cheyne

A wooden boat is seen on a bank of frozen Varzuga river in the village of Varzuga in Murmansk region, Russia October 31, 2019. REUTERS/Maxim Shemetov

Autumnal foliage is reflected on Loch Faskally, Pitlochry, Scotland, Britain October 26, 2019. REUTERS/Russell Cheyne

Autumnal foliage is reflected on Loch Faskally, Pitlochry, Scotland, Britain October 26, 2019. REUTERS/Russell Cheyne

A lightning storm is seen beyond the entrance to Valletta's Grand Harbour, Malta October 25, 2019. Picture taken with long exposure. REUTERS/Darrin Zammit Lupi

A lightning storm is seen beyond the entrance to Valletta's Grand Harbour, Malta October 25, 2019. Picture taken with long exposure. REUTERS/Darrin Zammit Lupi

A trail left by a plane is seen near a lightning storm, seen from Mdina, Malta October 26, 2019. Picture taken with long exposure. REUTERS/Darrin Zammit Lupi

A lightning storm is seen beyond the entrance to Valletta's Grand Harbour, Malta October 25, 2019. Picture taken with long exposure. REUTERS/Darrin Zammit Lupi

A lightning storm is seen beyond the entrance to Valletta's Grand Harbour, Malta October 25, 2019. Picture taken with long exposure. REUTERS/Darrin Zammit Lupi TPX IMAGES OF THE DAY

Fishermen's boats are seen during a sunset in Kraljevica, Croatia, October 24, 2019. REUTERS/Antonio Bronic

A fisherman rows his boat along autumnal trees during a sunny day at the Sylvenstein barrier lake, Germany October 15, 2019. REUTERS/Michael Dalder

A fisherman rows his boat along autumnal trees during a sunny day at the Sylvenstein barrier lake, Germany October 15, 2019. REUTERS/Michael Dalder

A fisherman rows his boat along autumnal trees during a sunny day at the Sylvenstein barrier lake, Germany October 15, 2019. REUTERS/Michael Dalder

People ride a pedal boat on the Vltava River as the sun sets over the Prague Castle in Prague, Czech Republic, September 10, 2019. REUTERS/David W Cerny

People ride pedal boats on the Vltava River as the sun sets over the Prague Castle in Prague, Czech Republic, September 10, 2019. REUTERS/David W Cerny

Oscar Limachi, 48, a member of the local Qewaya community who works as a tour guide on Lake Titicaca, rides his boat early morning in search of a fishing site near Qewaya village, Lake Titicaca, Bolivia, July 3, 2018. "Fish used to live, eat and lay their eggs amongst these plants. Now there are no plants, so no fish," Limachi said. "We are afraid that someday the fish will disappear or migrate forever." REUTERS/Manuel Seoane SEARCH "TITICACA CLIMATE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A canoe is seen a lake beside the track leading to the "Door of No Return" where slaves were loaded onto ships in the historic slave port town Ouidah, Benin, July 17, 2019. Picture taken July 17, 2019. REUTERS/Afolabi Sotunde

People walk along a pier during sunset in the Black Sea port of Sevastopol, Crimea August 23, 2019. REUTERS/Alexey Pavlishak

People steer canoes on a lagoon by the bridge near the historic slave port town Ouidah, Benin July 17, 2019. The 400-year anniversary of the first slave boat to arrive in America from Africa has caused a rush of interest in heritage tourism in West Africa, as ancestors go back to ancient sites to delve into a dark and often hidden past. Picture taken July 17, 2019. REUTERS/Afolabi Sotunde

The sun sets over Manhasset Bay in Port Washington, New York, U.S., August 19, 2019. REUTERS/Shannon Stapleton

Sailboats and small ships are seen in the bay in front of Charlotte Amalie, St. Thomas, U.S. Virgin Islands August 17, 2019. REUTERS/Marco Bello

A general view of Charlotte Amalie, St. Thomas, U.S. Virgin Islands August 16, 2019. REUTERS/Marco Bello

Large waves hit the harbour at Porthleven, Britain, August 10, 2019. REUTERS/Toby Melville.

A boat sails next to the shore in Port-au-Prince, Haiti, July 29, 2019. REUTERS/Andres Martinez Casares

Fishermen fish in the Mekong River in Nakhon Phanom, Thailand July 24, 2019. Picture taken July 24, 2019. REUTERS/Soe Zeya Tun

People protect themselves from the sun with parasols while rowing in Central Park as a heatwave continues to affect the region in New York, U.S., July 21, 2019. REUTERS/Andrew Kelly

Palestinians ride a boat in the Mediterranean Sea as others enjoy the beach during sunset on a hot day in the northern Gaza Strip July 9, 2019. REUTERS/Mohammed Salem

Palestinians ride a boat in the Mediterranean Sea in the northern Gaza Strip July 9, 2019. REUTERS/Mohammed Salem

Palestinians ride a boat in the Mediterranean Sea in the northern Gaza Strip July 9, 2019. REUTERS/Mohammed Salem

A man rows his boat in the tributary waters of Vembanad Lake against the backdrop of pre-monsoon clouds on the outskirts of Kochi, India, June 7, 2019. REUTERS/Sivaram V TPX IMAGES OF THE DAY

People enjoy a sunny day at the Lake Ammer (Ammersee) in Utting, near Munich, southern Germany, June 5, 2019. REUTERS/Michael Dalder

The sun rises in Cairo, Egypt, Egypt June 1, 2019. REUTERS/Mohamed Abd El Ghany

A yacht sails past the breakwater and lighthouse at the entrance to Grand Harbour as a rainbow is seen after heavy rainfall at sunset in Valletta, Malta May 30, 2019. REUTERS/Darrin Zammit Lupi

A yacht sails past the breakwater and lighthouse at the entrance to Grand Harbour, after heavy rainfall at sunset in Valletta, Malta May 30, 2019. REUTERS/Darrin Zammit Lupi

A view of the city of Puerto Williams is seen in Chile, May 16, 2019, Picture taken May 16, 2019. REUTERS/Jorge Vega

A view of the city of Puerto Williams is seen in Chile, May 16, 2019 Picture taken May 16, 2019. REUTERS/Jorge Vega

An Iraqi Marsh Arab man fishes at the Chebayesh marsh in Dhi Qar province, Iraq April 13, 2019. Picture taken April 13, 2019. REUTERS/Thaier al-Sudani

An Iraqi Marsh Arab man fishes at the Chebayesh marsh in Dhi Qar province, Iraq April 13, 2019. Picture taken April 13, 2019. REUTERS/Thaier al-Sudani

An aerial view of tulip fields near the city of Creil, Netherlands April 18, 2019. Picture taken April 18, 2019. REUTERS/Yves Herman

An aerial view of tulip fields near the city of Creil, Netherlands April 18, 2019. Picture taken April 18, 2019. REUTERS/Yves Herman?

A boat floats on low tide in the marshland at Sunderland Point, Britain February 25, 2019. REUTERS/Clodagh Kilcoyne SEARCH "KILCOYNE REDCAR " FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Men row a boat in the waters of the Arabian Sea on a smoggy evening in Mumbai, India, January 18, 2019. REUTERS/Francis Mascarenhas

A fishing boat sails during the last sunset of 2018 in Karachi, Pakistan, December 31, 2018. REUTERS/Akhtar Soomro

A man paddles a handmade boat across the Yamuna river on a foggy winter morning in New Delhi, India December 27, 2018. REUTERS/Adnan Abidi TPX IMAGES OF THE DAY

A boy uses his oar to break ice to move his boat on the frozen Anchar Lake on a cold winter day in Srinagar December 27, 2018. REUTERS/Danish Ismail

Men paddle their handmade boats across the Yamuna river on a foggy winter morning in New Delhi, India December 27, 2018. REUTERS/Adnan Abidi

A man paddles a handmade boat across the Yamuna river on a foggy winter morning in New Delhi, India December 27, 2018. REUTERS/Adnan Abidi

Vessels are washed up next to houses after a tsunami hit, in Anyer, Banten province, Indonesia December 25, 2018. REUTERS/Jorge Silva TPX IMAGES OF THE DAY

A container ship is seen from Victoria on the island of Gozo, Malta December 19, 2018. REUTERS/Darrin Zammit Lupi

Heads of discarded pufferfish are seen near Ohara port in Isumi, east of Tokyo, Japan November 21, 2018. Picture taken November 21, 2018. To match Insight CLIMATE-CHANGE/JAPAN-FUGU REUTERS/Issei Kato

Pufferfish caught by anglers swim in buckets at Ohara port in Isumi, east of Tokyo, Japan November 21, 2018. Picture taken November 21, 2018. To match Insight CLIMATE-CHANGE/JAPAN-FUGU REUTERS/Issei Kato

Large waves crash against the harbour wall and lighthouse at the Port of Folkestone in south east Britain, December 7, 2018. REUTERS/Toby Melville

Large waves crash against the harbour wall and lighthouse at the Port of Folkestone in south east Britain, December 7, 2018. REUTERS/Toby Melville

Large waves crash against the harbour wall and lighthouse at the Port of Folkestone in south east Britain, December 7, 2018. REUTERS/Toby Melville