Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, inspect the ceiling of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, stands at the entrance of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, hikes towards the entrance of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, inspect the entrance of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, enters a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, explore a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, explores a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, hike towards the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, inspect a crack in the ceiling of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, inspect the ceiling of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, explores a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

A general view of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, explores a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, explore a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, inspect the entrance of a natural glacier cavity of Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, explore a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, explores a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, explores a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner TPX IMAGES OF THE DAY 

Glaciologist Andrea Fischer, from the Austrian Academy of Sciences, inspects a piece of ice inside a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Glaciologists Andrea Fischer and Martin Stocker-Waldhuber, from the Austrian Academy of Sciences, inspect the entrance of a natural glacier cavity of the Jamtalferner glacier near Galtuer, Austria, October 15, 2021. Giant ice caves have appeared in glaciers accelerating the melting process faster than expected as warmer air rushes through the ice mass until it collapses. Picture taken October 15, 2021. REUTERS/Lisi Niesner 

Residents who live on the bank of the Padma river shift their houses to a safer place as the river bank is about to disintegrate due to soil erosion in Munshiganj, Bangladesh, August 26, 2021. REUTERS/Mohammad Ponir Hossain 

Residents who live on the bank of the Padma river shift their houses to a safer place as the river bank is about to disintegrate due to soil erosion in Munshiganj, Bangladesh, August 26, 2021. REUTERS/Mohammad Ponir Hossain 

A family who live on the bank of the Padma river shift their houses to a safer place as the river bank is about to disintegrate due to soil erosion in Munshiganj, Bangladesh, August 26, 2021. REUTERS/Mohammad Ponir Hossain 

Residents who live on the bank of the Padma river shift their houses to a safer place as the river bank about to disintegrate due to soil erosion in Munshiganj, Bangladesh, August 26, 2021. REUTERS/Mohammad Ponir Hossain 

A view shows Notre-Dame de Paris Cathedral, which was damaged in a devastating fire one year ago, as restoration work resumes slowly after an interruption due to the lockdown imposed to slow the rate of the coronavirus disease (COVID-19) in Paris, France, April 27, 2020. REUTERS/Gonzalo Fuentes 

A woman walks past damaged buildings with her child in the rebel-held Idlib city, Syria April 19, 2020. Picture taken April 19, 2020. REUTERS/Khalil Ashawi 

The remains of crushed coconut palms are seen in a farm, as the spread of the coronavirus disease (COVID-19) continues, in Homestead, Florida, U.S., April 17, 2020. REUTERS/Marco Bello 

A view shows the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire one year ago, as the coronavirus disease (COVID-19) lockdown slows down its restoration in Paris, France, April 13, 2020. Picture taken April 13, 2020. REUTERS/Charles Platiau 

A view shows the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire one year ago, as the coronavirus disease (COVID-19) lockdown slows down its restoration in Paris, France, April 11, 2020. Picture taken April 11, 2020. REUTERS/Charles Platiau 

A view shows the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire one year ago, as the coronavirus disease (COVID-19) lockdown slows down its restoration in Paris, France, April 11, 2020. Picture taken April 11, 2020. REUTERS/Charles Platiau 

A view shows the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire one year ago, as the coronavirus disease (COVID-19) lockdown slows down its restoration in Paris, France, April 13, 2020. Picture taken April 13, 2020. REUTERS/Charles Platiau 

A broken coffin lies on the shores of a river amid the outbreak of the coronavirus disease (COVID-19), in Guayaquil, Ecuador April 10, 2020. REUTERS/Vicente Gaibor del Pino 

A view shows an apartment block, which partially collapsed after an apparent gas explosion, in the town of Orekhovo-Zuyevo near Moscow, Russia April 4, 2020. REUTERS/Maxim Shemetov 

A worker destroys flowers in a nursery, while flower growers have started destroying their products by failing to export them due to export restrictions after the coronavirus disease (COVID-19), in Llano Grande, Costa Rica, March 30, 2020. Picture taken on March 30, 2020. REUTERS/ Juan Carlos Ulate 

A worker destroys flowers in a nursery, while flower growers have started destroying their products by failing to export them due to export restrictions after the coronavirus disease (COVID-19), in Llano Grande, Costa Rica, March 30, 2020. Picture taken on March 30, 2020. REUTERS/ Juan Carlos Ulate 

An aerial view shows a deforested plot of the Amazon near Porto Velho, Rondonia State, Brazil August 21, 2019. Picture taken August 21, 2019. REUTERS/Ueslei Marcelino 

Charred trunks are seen on a tract of Amazon jungle, that was recently burned by loggers and farmers, in Porto Velho, Brazil August 23, 2019. Picture taken August 23, 2019. REUTERS/Ueslei Marcelino 

A charred trunk is seen on a tract of the Amazon jungle, that was recently burned by loggers and farmers, in Porto Velho, Brazil August 23, 2019. Picture taken August 23, 2019. REUTERS/Ueslei Marcelino 

An aerial view shows a deforested plot of the Amazon near Porto Velho, Rondonia State, Brazil August 21, 2019. Picture taken August 21, 2019. REUTERS/Ueslei Marcelino 

An aerial view shows a deforested plot of the Amazon near Porto Velho, Rondonia State, Brazil August 21, 2019. Picture taken August 21, 2019. REUTERS/Ueslei Marcelino 

A demonstrator throws a Molotov cocktail at a police vehicle during a protest against Chile's government in Santiago, Chile March 6, 2020. REUTERS/Pablo Sanhueza 

A police water cannon vehicle is set aflame during clashes with demonstrators during a protest against Chile's government in Santiago, Chile March 6, 2020. REUTERS/Pablo Sanhueza 

A demonstrator throws a rock at a police vehicle which has been set ablaze during a protest against Chile's government in Santiago, Chile March 6, 2020. REUTERS/Ivan Alvarado 

A demonstrator reacts near a police vehicle which has been set ablaze amidst clashes with police during a protest against Chile's government in Santiago, Chile March 6, 2020. REUTERS/Ivan Alvarado 

Demonstrators react near a riot police vehicle which was set on fire during a protest against Chile's government in Santiago, Chile March 6, 2020. REUTERS/Ivan Alvarado 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

Damage is seen in an aerial picture after a tornado touched down in eastern Nashville, Tennessee, U.S. March 3, 2020. REUTERS/Drone Base 

A view of burnt out mosque is seen from inside in a riot affected area following clashes between people demonstrating for and against a new citizenship law in New Delhi, India, March 2, 2020. REUTERS/Danish Siddiqui 

Floodwater is seen in front of Tewkesbury Abbey, following Storm Jorge, in Tewkesbury, Britain, March 1, 2020. REUTERS/Toby Melville 

Floodwater is seen in front of Tewkesbury Abbey, following Storm Jorge, in Tewkesbury, Britain, March 1, 2020. Picture taken using a fisheye lens. REUTERS/Toby Melville 

Floodwater is seen in front of Tewkesbury Abbey, following Storm Jorge, in Tewkesbury, Britain, March 1, 2020. REUTERS/Toby Melville 

Damage is seen after shells fell on a residential area, in Abu Slim district south of Tripoli, Libya February 28, 2020. REUTERS/Ismail Zitouny 

A flooded street is pictured after heavy rainfall in Tiquipaya, Bolivia, February 22, 2020. REUTERS/Danilo Balderrama 

Police tape is seen in the area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020. REUTERS/Kai Pfaffenbach 

A sign is pictured in a flooded street after Storm Dennis in Hereford, Britain February 17, 2020. REUTERS/Phil Noble