A general view of empty Grand Mosque on the first day of the holy month of Ramadan during the outbreak of the coronavirus disease (COVID-19), in the holy city of Mecca, Saudi Arabia April 24, 2020. Picture taken April 24, 2020. REUTERS/Ganoo Essa 

A general view of an empty Grand Mosque on the first day of the holy month of Ramadan during the outbreak of the coronavirus disease (COVID-19), in the holy city of Mecca, Saudi Arabia April 24, 2020. REUTERS/Ganoo Essa 

Worshippers pray Taraweeh at Kaaba in the Grand Mosque on the first day of the holy month of Ramadan during the outbreak of the coronavirus disease (COVID-19), in the holy city of Mecca, Saudi Arabia April 24, 2020. Picture taken through a window. REUTERS/Yasser Bakhsh 

Worshippers pray Taraweeh at Kaaba in the Grand Mosque on the first day of the holy month of Ramadan during the outbreak of the coronavirus disease (COVID-19), in the holy city of Mecca, Saudi Arabia April 24, 2020. Picture taken through a window. REUTERS/Yasser Bakhsh 

An aerial view of deserted Grand Mosque on the first day of the holy month of Ramadan during the outbreak of the coronavirus disease (COVID-19), in the holy city of Mecca, Saudi Arabia April 24, 2020. Picture taken through a window. REUTERS/Yasser Bakhsh 

A general view of the deserted Sultanahmet Square, with the Byzantine-era monument of Hagia Sophia in the background, on the first day of the holy month of Ramadan during a four-day curfew which was imposed to prevent the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, April 24, 2020. REUTERS/Umit Bektas 

A woman claps from her balcony during the daily applause in support of healthcare workers, amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, April 24, 2020. REUTERS/Susana Vera 

A dog is seen on the beach during the coronavirus disease (COVID-19) outbreak, in Cromer, Britain April 24, 2020. REUTERS/Andrew Couldridge 

Closed beach huts are seen during the coronavirus disease (COVID-19) outbreak, in Cromer, Britain April 24, 2020. REUTERS/Andrew Couldridge 

A man is pictured inside the closed Great Mosque of Brussels during the first day of Ramadan amid the coronavirus disease (COVID-19) outbreak, Belgium April 24, 2020. REUTERS/Francois Lenoir 

Stones painted by passers-by are seen at Giggleswick Settle Bridge, as the spread of the coronavirus disease (COVID-19) continues, in Settle, Yorkshire, Britain April 24, 2020. REUTERS/Lee Smith 

A stone painted by passers-by is seen at Giggleswick Settle Bridge, as the spread of the coronavirus disease (COVID-19) continues, in Settle, Yorkshire, Britain April 24, 2020. REUTERS/Lee Smith 

Livestock eat rotten lettuce at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

Trees are seen in a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

A security officer prays at the corridor of the Great Istiqlal mosque as it is closed during the imposition of large-scale restrictions by the government to prevent the spread of coronavirus disease (COVID-19), during the holy fasting month of Ramadan in Jakarta, Indonesia, April 24, 2020. REUTERS/Willy Kurniawan 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

An aerial view shows a forest near Gummersbach, Germany, April 24, 2020, following an unusually warm, dry winter after a summer of record temperatures leaving forests dried out. Picture taken with a drone. REUTERS/Stephane Nitschke 

A cat sits between tombstones at an ottoman era cemetery in the garden of Eyup Sultan Mosque during the first day of Ramadan and the second of a four-day curfew, as the spread of the coronavirus disease (COVID-19) continues, in Istanbul, Turkey April 24, 2020. REUTERS/Umit Bektas 

An area of the Great Istiqlal Mosque is seen empty a moment before iftar time as it closed during the imposition of large-scale restrictions by the government to prevent the spread of coronavirus disease (COVID-19) outbreak, during the holy fasting month of Ramadan in Jakarta, Indonesia, April 24, 2020. REUTERS/Willy Kurniawan 

The dog sits in front of Suleymaniye Mosque during the first day of Ramadan and the second of a four-day curfew, as the spread of the coronavirus disease (COVID-19) continues, in Istanbul, Turkey April 24, 2020. REUTERS/Umit Bektas 

A dog wearing an Elizabethan collar, a protective device to prevent it from licking its body, walks with its owner (not pictured) during a nationwide lockdown to slow the spreading of the coronavirus disease (COVID-19) in Kolkata, India, April 24, 2020. REUTERS/Rupak De Chowdhuri 

An Israeli checkpoint is seen empty of Palestinians on the first Friday of the holy fasting month of Ramadan amid concerns about the spread of the coronavirus disease (COVID-19), in Bethlehem in the Israeli-occupied West Bank April 24, 2020. REUTERS/Mussa Qawasma 

Signs are aligned as tribute to the NHS, as the spread of the coronavirus disease (COVID-19) continues, in East London, Britain, April 24, 2020. REUTERS/Henry Nicholls 

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido 

A St. George's flag flutters on a church, as the spread of the coronavirus disease (COVID-19) continues, in Great Budworth, Britain April 23, 2020. REUTERS/Molly Darlington 

The Great Mosque of Istiqlal is seen empty as it is closed during the imposition of large-scale restrictions by the government to prevent the spread of coronavirus disease (COVID-19), at the first day of holy fasting month of Ramadan in Jakarta, Indonesia, April 23, 2020. REUTERS/Willy Kurniawan 

A message in support of carers is pictured on a road, amid the coronavirus disease (COVID-19) outbreak, in Liverpool, Britain April 23, 2020. REUTERS/Phil Noble 

A single aircraft is pictured next to the Television tower, as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, April 23, 2020. REUTERS/Fabrizio Bensch 

A general view shows the main mosque empty on the eve of Ramadan amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, April 23, 2020. REUTERS/Juan Medina 

A general view shows the main mosque empty on the eve of Ramadan amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, April 23, 2020. REUTERS/Juan Medina 

A mosque is seen closed on the eve of Ramadan after Thai government ordered all Mosques to stay closed for the start of Ramadan, as the spread of the coronavirus disease (COVID-19) continues, Bangkok, Thailand, April 23, 2020. REUTERS/Jorge Silva 

A devotee of Sao Jorge, also known as Saint George, prays outside a closed church during Sao Jorge's Day celebrations, amid the coronavirus disease (COVID-19) outbreak, in Rio de Janeiro, Brazil April 23, 2020. REUTERS/Ricardo Moraes 

People gather on the roof of Al Musariin mosque to watch the moon, to mark the first day of Ramadan, as the spread of the coronavirus disease (COVID-19) continues, in Jakarta, Indonesia, April 23, 2020. REUTERS/Willy Kurniawan 

A robin is seen in a garden, as the spread of the coronavirus disease (COVID-19) continues, in West London, Britain, April 22, 2020. Picture taken April 22, 2020. REUTERS/Toby Melville 

Workers harvest asparagus in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

A worker uncovers asparagus from soil during harvest in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

A blackbird bathes in a mud puddle on the 50th anniversary of Earth Day, as the global outbreak of the coronavirus disease (COVID-19) continues, in Ronda, southern Spain, April 22, 2020. REUTERS/Jon Nazca 

The Pacific Ocean is seen at sunrise on the 50th anniversary of Earth Day, as the global outbreak of coronavirus disease (COVID-19) continues, in Huntington Beach, California, U.S., April 22, 2020. REUTERS/Lucy Nicholson 

A surfer walks into the Pacific Ocean at sunrise on the 50th anniversary of Earth Day, as the global outbreak of coronavirus disease (COVID-19) continues, in Huntington Beach, California, U.S., April 22, 2020. REUTERS/Lucy Nicholson 

A surfer paddles into the Pacific Ocean at sunrise on the 50th anniversary of Earth Day, as the global outbreak of coronavirus disease (COVID-19) continues, in Huntington Beach, California, U.S., April 22, 2020. REUTERS/Lucy Nicholson 

A surfer walks into the Pacific Ocean at sunrise on the 50th anniversary of Earth Day, as the global outbreak of coronavirus disease (COVID-19) continues, in Huntington Beach, California, U.S., April 22, 2020. REUTERS/Lucy Nicholson 

A man looks across the River Thames at sunset on Earth Day in London, Britain, April 22, 2020. REUTERS/Kevin Coombs 

Wind turbines are pictured in a field as the country battles against the coronavirus disease (COVID-19) outbreak, near Waremme, Belgium April 22, 2020. REUTERS/Yves Herman 

A digital board is seen on the road as the spread of the coronavirus disease (COVID-19) continues in Southport, Britain, April 22, 2020. REUTERS/Phil Noble 

The Italian flag and the banner "Everything will be fine" hang from a building as Italy's lockdown measures continue to prevent the spread of coronavirus disease (COVID-19) in Venice, Italy, April 22, 2020. REUTERS/Manuel Silvestri 

An empty Saint Mark's Basin is seen in Venice as Italy's lockdown measures continue to prevent the spread of coronavirus disease (COVID-19) in Venice, Italy, April 22, 2020. REUTERS/Manuel Silvestri 

A general view shows the Kiev Pechersk Lavra monastery, where multiple cases of the coronavirus disease (COVID-19) have been confirmed, in Kiev, Ukraine April 22, 2020. REUTERS/Valentyn Ogirenko 

A general view shows the Kiev Pechersk Lavra monastery, where multiple cases of the coronavirus disease (COVID-19) have been confirmed, in Kiev, Ukraine April 22, 2020. REUTERS/Valentyn Ogirenko 

A digital board is seen on the road as the spread of the coronavirus disease (COVID-19) continues in Southport, Britain, April 22, 2020. REUTERS/Phil Noble 

A digital board is seen on the road as the spread of the coronavirus disease (COVID-19) continues in Southport, Britain, April 22, 2020. REUTERS/Phil Noble 

A combination picture shows birds flying over the waters of the Yamuna river near the Signature bridge on November 1, 2019 and after air pollution level started to drop during a nationwide lockdown to slow the spreading of the coronavirus disease (COVID-19), on Earth Day in New Delhi, India, April 22, 2020. REUTERS/Anushree Fadnavis 

A man rows a makeshift raft in the Yamuna river on the Earth Day, during a lockdown to slow spread of the coronavirus disease (COVID-19), in New Delhi, India, April 22, 2020. REUTERS/Anushree Fadnavis 

A red fox stands on an empty skate park in the southern Israeli city of Ashkelon, where predatory animals now roam amid the coronavirus disease (COVID-19) restrictions that have closed beaches and emptied sidewalks April 19, 2020. Picture taken on April 19, 2020. REUTERS/ Amir Cohen