People enjoy a sunny day in Circo Massimo amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, March 2, 2021. REUTERS/Yara Nardi

People enjoy a sunny day in Circo Massimo amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, March 2, 2021. REUTERS/Yara Nardi

A man jogs during a sunny day at Circo Massimo amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, March 2, 2021. REUTERS/Yara Nardi

A woman wearing protective face mask sits on a bench at Circo Massimo during a sunny day amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, March 2, 2021. REUTERS/Yara Nardi

A general view of Circo Massimo during a sunny day amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, March 2, 2021. REUTERS/Yara Nardi

Blooming crocuses are seen during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, at a public park in Zurich, Switzerland, March 2, 2021. REUTERS/Arnd Wiegmann

Blooming crocuses are seen during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, at a public park in Zurich, Switzerland, March 2, 2021. REUTERS/Arnd Wiegmann

A bee collects nectar from crocus during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, at a public park in Zurich, Switzerland, March 2, 2021. REUTERS/Arnd Wiegmann

A bee collects nectar from crocus during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, at a public park in Zurich, Switzerland, March 2, 2021. REUTERS/Arnd Wiegmann

People enjoy sunny winter weather at Villa Wesendonck as the spread of the coronavirus disease (COVID-19) continues in Zurich, Switzerland, March 2, 2021. REUTERS/Arnd Wiegmann

People enjoy the sunny winter weather in front of the opera house, as the spread of the coronavirus disease (COVID-19) continues, on Sechselaeutenplatz square in Zurich, Switzerland, March 1, 2021. REUTERS/Arnd Wiegmann

A swan spreads his wings while people enjoy the sunny winter weather sitting on the banks of Lake Zurich, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland, March 1, 2021. REUTERS/Arnd Wiegmann

People walk along the Andreyevsky Bridge over the Moskva River during a sunny day in Moscow, Russia February 27, 2021. REUTERS/Shamil Zhumatov

A man paints during a sunny day at the Villa Borghese park amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, February 26, 2021. REUTERS/Guglielmo Mangiapane

A woman enjoys a sunny day at the Villa Borghese park amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, February 26, 2021. REUTERS/Guglielmo Mangiapane

A man paints during a sunny day at the Villa Borghese park amid the coronavirus disease (COVID-19) outbreak in Rome, Italy, February 26, 2021. REUTERS/Guglielmo Mangiapane

A woman walks with a dog along the banks of the Dnipro river, on a sunny winter day in Kyiv, Ukraine February 25, 2021. REUTERS/Valentyn Ogirenko

Pedestrians are silhouetted as they walk on a street during a sunny day in central Kyiv, Ukraine February 25, 2021. REUTERS/Gleb Garanich

People enjoy a warm and sunny weather of the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 21, 2021. REUTERS/Eric Gaillard

A man looks through binoculars on a sunny winter day in Moscow, Russia February 19, 2021. REUTERS/Maxim Shemetov

People take their lunch as they enjoy a sunny and warm weather on the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, February 18, 2021. REUTERS/Eric Gaillard

Beachgoers enjoy sunny weather in Arpoador beach as the Carnival celebrations were cancelled due to the coronavirus disease (COVID-19) pandemic, in Rio de Janeiro, Brazil February 16, 2021. REUTERS/Ricardo Moraes

Beachgoers enjoy sunny weather in Leblon Beach as the Carnival celebrations were cancelled due to the coronavirus disease (COVID-19) pandemic, in Rio de Janeiro, Brazil February 16, 2021. REUTERS/Ricardo Moraes

Beachgoers enjoy sunny weather in Leblon Beach as the Carnival celebrations were cancelled due to the coronavirus disease (COVID-19) pandemic, in Rio de Janeiro, Brazil February 16, 2021. REUTERS/Ricardo Moraes TPX IMAGES OF THE DAY

Beachgoers enjoy sunny weather in Arpoador Beach as the Carnival celebrations were cancelled due to the coronavirus disease (COVID-19) pandemic, in Rio de Janeiro, Brazil February 16, 2021. REUTERS/Ricardo Moraes

People surf during sunny weather in Saltburn-by-the-sea, Britain, February 15, 2021. Picture taken with a drone. REUTERS/Lee Smith

People surf during sunny weather in Saltburn-by-the-sea, Britain, February 15, 2021. Picture taken with a drone. REUTERS/Lee Smith

People surf during sunny weather in Saltburn-by-the-sea, Britain, February 15, 2021. Picture taken with a drone. REUTERS/Lee Smith

A surfer surfs at Saltburn-by-the-sea Beach on a sunny day in Saltburn-by-the-sea, Britain, February 15, 2021. Picture taken with a drone. REUTERS/Lee Smith

A surfer is seen at Saltburn-by-the-sea Beach on a sunny day in Saltburn-by-the-sea, Britain, February 15, 2021. Picture taken with a drone. REUTERS/Lee Smith TPX IMAGES OF THE DAY

People walk on the Saltburn-by-the-sea Pier on a sunny day in Saltburn-by-the-sea, Britain, February 15, 2021. Picture taken with a drone. REUTERS/Lee Smith

Two boys play ice hockey on a frozen pond at the Zoo Zurich public park during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 15, 2021. REUTERS/Arnd Wiegmann TPX IMAGES OF THE DAY

People enjoy the sunny day on the frozen river spree at Rummelsburger Bay in Berlin, Germany, February 14, 2021. REUTERS/Annegret Hilse

People enjoy the sunny day on the frozen river spree at Rummelsburger Bay in Berlin, Germany, February 14, 2021. REUTERS/Annegret Hilse

People enjoy the sunny day on the frozen river spree at Rummelsburger Bay in Berlin, Germany, February 14, 2021. REUTERS/Annegret Hilse

People use their sledges at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

People use their sledges at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

People use their sledges at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

People use their sledges at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

Members of the 'Berlin Shreds' snowboard enthusiast crew arrive at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

Members of the 'Berlin Shreds' snowboard enthusiast crew train during the university semester break at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

A member of the 'Berlin Shreds' crew takes a jump during the university semester break at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

A member of the 'Berlin Shreds' snowboard enthusiast crew trains during the university semester break at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

A member of the 'Berlin Shreds' snowboard enthusiast crew trains during the university semester break at the Luebars park during a sunny day following snowfall in Berlin, Germany, February 12, 2021. REUTERS/Fabrizio Bensch

People use their sledges at Volkspark Wilmersdorf during a sunny day following snowfall in Berlin, Germany, February 10, 2021. REUTERS/Fabrizio Bensch

People use their sledges at Volkspark Wilmersdorf during a sunny day following snowfall in Berlin, Germany, February 10, 2021. REUTERS/Fabrizio Bensch

People use their sledges at Volkspark Wilmersdorf during a sunny day following snowfall in Berlin, Germany, February 10, 2021. REUTERS/Fabrizio Bensch

People use their sledges at Volkspark Wilmersdorf during a sunny day following snowfall in Berlin, Germany, February 10, 2021. REUTERS/Fabrizio Bensch

Tourists enjoy a sunny day during a two-day curfew amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, February 6, 2021. REUTERS/Umit Bektas

People row during sunny winter weather on Lake Zurich as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 5, 2021. REUTERS/Arnd Wiegmann

People enjoy the sunny winter weather while sitting on the banks of Lake Zurich, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 5, 2021. REUTERS/Arnd Wiegmann

People enjoy the sunny winter weather while sitting on the banks of Lake Zurich, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 5, 2021. REUTERS/Arnd Wiegmann

A cormorant spreads his wings as it stands on a stone in the Sihl River during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 5, 2021. REUTERS/Arnd Wiegmann

Birds fly over the Limmat River during sunny winter weather, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland February 5, 2021. REUTERS/Arnd Wiegmann

Tourists enjoy a sunny day during a two-day curfew amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, January 31, 2021. REUTERS/Umit Bektas

People enjoy a sunny weather in Nantes amid the coronavirus disease (COVID-19) outbreak in France, January 25, 2021. REUTERS/Stephane Mahe

People, wearing protective face masks, walk on the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, January 25, 2021. REUTERS/Eric Gaillard

People enjoy a sunny weather on the Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, January 25, 2021. REUTERS/Eric Gaillard

People enjoy a sunny weather on the beach of Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, January 24, 2021. REUTERS/Eric Gaillard

People enjoy a sunny weather on the beach of Promenade des Anglais in Nice amid the coronavirus disease (COVID-19) outbreak in France, January 24, 2021. REUTERS/Eric Gaillard