Belgian jewellery designer Olivia Hainaut sews a gold-plated clover on a protective mask in her workshop amid the coronavirus disease (COVID-19) outbreak in Brussels, Belgium July 22, 2020. Picture taken July 22, 2020. REUTERS/Francois Lenoir

Belgian jewellery designer Olivia Hainaut poses wearing a protective mask with a gold-plated clover reading "Be lucky" in her workshop amid the coronavirus disease (COVID-19) outbreak in Brussels, Belgium July 22, 2020. Picture taken July 22, 2020. REUTERS/Francois Lenoir

Clover Grill's waiter Joe Congleton takes orders through an open door, keeping social distancing, after restrictions of the lockdown were eased to allow 25 percent of permitted occupancy in stores and restaurants, amid the coronavirus disease (COVID-19) outbreak, in New Orleans, Louisiana, U.S., May 16, 2020. Picture taken May 16, 2020. REUTERS/Kathleen Flynn

Stools are covered with a sign forbidding people to sit down near to each other at Clover Grill, after restrictions of the lockdown were eased to allow 25 percent of permitted occupancy in stores and restaurants, amid the coronavirus disease (COVID-19) outbreak, in New Orleans, Louisiana, U.S., May 16, 2020. Picture taken May 16, 2020. REUTERS/Kathleen Flynn

People pass by a closed Clover Delicatessen, during the outbreak of the coronavirus disease (COVID-19), in New York City, U.S., April 29, 2020. REUTERS/Brendan McDermid

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Clover Welsh, dressed in an original costume creation as the cousin of Daenerys Targaryen, stands for a portrait before the final episode of Game of Thrones at a watch party in the Manhattan borough of New York City, U.S., May 19, 2019. REUTERS/Caitlin Ochs

Clover Welsh, dressed in an original costume creation as the cousin of Daenerys Targaryen, stands for a portrait before the final episode of Game of Thrones at a watch party in the Manhattan borough of New York City, U.S., May 19, 2019. REUTERS/Caitlin Ochs

A woman wears clover glasses as he she watches the 258th St Patrick's Day Parade on 5th Avenue in Manhattan in New York City, New York, U.S., March 16, 2019. REUTERS/Mike Segar

Horse Racing - Cheltenham Festival - Cheltenham Racecourse, Cheltenham, Britain - March 14, 2019 General view of a racegoer during Cheltenham Festival Action Images via Reuters/Paul Childs

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

A man speaks as U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

People carry placards as U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

A lady speaks at a town hall meeting held by U.S. Rep. Dave Brat (R-VA) with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) (not pictured) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

U.S. Rep. Dave Brat (R-VA) holds a town hall meeting with constituents at Clover Hill Assembly of God in Midlothian, Virginia, U.S., May 9, 2017. REUTERS/Chet Strange

A paradegoer wearing a green clover suit poses for a picture during the St. Patrick's Day Parade in New York City, New York, U.S. March 17, 2017. REUTERS/Joe Penney

Clover Moore, Lord Mayor of the City of Sydney, Australia, speaks to the media during a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico December 2, 2016. REUTERS/Henry Romero

Paris Mayor Anne Hidalgo, Caracas Mayor Helen Fernandez, Cape Town Mayor Patricia De Lille, French Environment Minister Segolene Royal, Washington Mayor Muriel Bowser, Sydney Lord Mayor Clover Moore and Christiana Figueres, former Executive Secretary of United Nations Framework Convention on Climate Change, attend a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico December 2, 2016. REUTERS/Henry Romero

Paris Mayor Anne Hidalgo poses with Caracas Mayor Helen Fernandez, Cape Town Mayor Patricia De Lille, French Environment Minister Segolene Royal, Washington Mayor Muriel Bowser, Sydney Lord Mayor Clover Moore and Christiana Figueres, former Executive Secretary of United Nations Framework Convention on Climate Change, pose with a placard after a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico December 2, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks to the media during a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico December 2, 2016. REUTERS/Henry Romero

Michael Bloomberg, the U.N. Special Envoy for Cities and Climate Change (L), Paris Mayor Anne Hidalgo (2nd L), Sydney Lord Mayor Clover Moore (2nd R), Rio de Janeiro mayor Eduardo Paes (R) and other mayors pose after eleven cities were honoured at the C40 Cities Awards ceremony during the C40 Mayors Summit in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Michael Bloomberg, the U.N. Special Envoy for Cities and Climate Change (L), Paris Mayor Anne Hidalgo (2nd L), Sydney Lord Mayor Clover Moore (2nd R), Rio de Janeiro mayor Eduardo Paes (R) and other mayors pose after eleven cities were honoured at the C40 Cities Awards ceremony during the C40 Mayors Summit in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks next to Michael Bloomberg, the U.N. Special Envoy for Cities and Climate Change, at the Ceremony Awards of "C40 Awards the 11 Best Cities of 2016 for Addressing Climate Change", during the C40 Mayors Summit in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Michael Bloomberg, the U.N. Special Envoy for Cities and Climate Change (L), Paris Mayor Anne Hidalgo (2nd L), Sydney Lord Mayor Clover Moore (2nd R), Rio de Janeiro mayor Eduardo Paes (R) and other mayors pose after eleven cities were honoured at the C40 Cities Awards ceremony during the C40 Mayors Summit in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks next to Vancouver Mayor Gregor Robertson during a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico December 1, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks to the media during a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks to the media during a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks to the media during a news conference at the C40 Mayors Summit at a hotel in Mexico City, Mexico, December 1, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks during an interview with Reuters as she attends at the C40 Mayors Summit at a hotel in Mexico City, Mexico November 30, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks during an interview with Reuters as she attends at the C40 Mayors Summit at a hotel in Mexico City, Mexico November 30, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks during an interview with Reuters as she attends at the C40 Mayors Summit at a hotel in Mexico City, Mexico November 30, 2016. REUTERS/Henry Romero

Sydney Lord Mayor Clover Moore speaks during an interview with Reuters as she attends at the C40 Mayors Summit at a hotel in Mexico City, Mexico November 30, 2016. REUTERS/Henry Romero

Sydney's Lord Mayor Clover Moore (C) poses for a picture with Australia's Olympic athletes returning from Rio during an official welcome ceremony at the Sydney Opera House in Australia, August 29, 2016. REUTERS/Jason Reed

Sydney's Lord Mayor Clover Moore (C) waves with Australia's Olympic athletes returning from Rio during an official welcome ceremony at the Sydney Opera House in Australia, August 29, 2016. REUTERS/Jason Reed

Japan's Prime Minister Shinzo Abe (C) poses with child actors, members of Japanese idol group Momoiro Clover Z and other show-business celebrities at a cherry blossom viewing party at Shinjuku Gyoen park in Tokyo, Japan April 9, 2016. REUTERS/Toru Hanai

Japan's Prime Minister Shinzo Abe (C) poses with child actors, members of Japanese idol group Momoiro Clover Z and other show-business celebrities at a cherry blossom viewing party at Shinjuku Gyoen park in Tokyo, Japan April 9, 2016. REUTERS/Toru Hanai

Japan's Prime Minister Shinzo Abe (C) poses with child actors, members of Japanese idol group Momoiro Clover Z and other show-business celebrities at a cherry blossom viewing party at Shinjuku Gyoen park in Tokyo, Japan April 9, 2016. REUTERS/Toru Hanai TPX IMAGES OF THE DAY

A soldier wears shamrock as he barks orders during the St Patrick's Day Parade at the Irish Guards at Cavalry Barracks, Hounslow, west London, March 17, 2016. REUTERS/Heathcliff O'Malley/Pool