A nurse demonstrates against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

A nurse demonstrates against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

A nurse demonstrates against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

Nurses and other healthcare workers demonstrate against unsafe working conditions and inadequate personal protective equipment (PPE) outside the Rikers Island Correctional facility during the outbreak of the coronavirus disease (COVID-19) in the Queens borough of New York City, U.S., May 7, 2020. REUTERS/Brendan McDermid

A policewoman sits at a table in front of the evidence area, as members of a safety team established by police and local authorities assess and clear unsafe items, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities look on as they assess and clear unsafe items at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China November 28, 2019. REUTERS/Leah Millis

Member of a safety team established by police and local authorities inspects around a statue of Dr Sun Yat-sen, as they assess and clear unsafe items at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China November 28, 2019. REUTERS/Leah Millis TPX IMAGES OF THE DAY

Members of a safety team established by police and local authorities enter the Hong Kong Polytechnic University (PolyU) to assess and clear unsafe items, in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities enter the Hong Kong Polytechnic University (PolyU) to assess and clear unsafe items, in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities assess and clear unsafe items, next to the media, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities assess and clear unsafe items, next to the media, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Member of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Member of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items, at the Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

A member of a safety team established by police and local authorities walks on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

A member of a safety team established by police and local authorities is seen on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Members of a safety team established by police and local authorities arrive on campus to assess and clear unsafe items at Hong Kong Polytechnic University (PolyU) in Hong Kong, China, November 28, 2019. REUTERS/Leah Millis

Evacuees at the Veterans Memorial Auditorium sleep in their cars because they felt unsafe sleeping in the Red Cross shelter after being evacuated from the Kincade fire in Santa Rosa, California, U.S. October 28, 2019. REUTERS/Kate Munsch

A man runs past a burning barrier during a march in Hong Kong, China October 20, 2019. REUTERS/Tyrone Siu

A general view shows the Popocatepetl volcano spews a cloud of ash high into the air as is pictured from a plane during a flight to Mexico City, Mexico October 18, 2019. REUTERS/Henry Romero?

An aerial view shows the Popocatepetl volcano spewing a cloud of ash high into the air as is pictured from a plane during a flight to Mexico City, Mexico October 18, 2019. REUTERS/Henry Romero?

A two and half month-old lion cub leans on his mother, inside their enclosure at the Zoo in Peshawar, Pakistan October 18, 2019. REUTERS/Fayaz Aziz

Cows graze in a field in front of the Wildstrubel mountain and the Plaine Morte glacier, days ahead federal elections, in Lenk, Switzerland October 14, 2019. Picture taken October 14, 2019. REUTERS/Denis Balibouse

A hawk appears to tussle with a group of smaller birds near the White House in Washington, U.S., October 15, 2019. REUTERS/Jonathan Ernst

A leopard sits in the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard walks through the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard walks through the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard walks through the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard sits in the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A male lion lays near a female after mating in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

A male lion stands over a female after mating in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

Lions mate in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

A leopard is seen after taking a kill to the top of a tree in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

A male lion is seen in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

A wind-driven wildfire burns near power line tower in Sylmar, California, U.S., October 10, 2019. REUTERS/ Gene Blevins

A wind-driven wildfire burns near power line tower in Sylmar, California, U.S., October 10, 2019. REUTERS/ Gene Blevins

A pile of marijuana is being incinerated at the 28th Infantry Batallion in Tijuana, Mexico September 26, 2019. REUTERS/Jorge Duenes

Guns hang with a hammock on the wall of a Tembe indigenous tribe's house, who are facing a conflict with illegal loggers on their land, in Teko-haw indigenous village near Paragominas, Para state, Brazil September 11, 2019. Picture taken September 11, 2019. REUTERS/Ricardo Moraes

A donkey rests against a concrete barrier with a sign warning of Israeli gunfire, in the Bedouin village of Al-Maleh in Jordan valley in the Israeli-occupied West Bank March 13, 2019. Picture taken March 13, 2019. REUTERS/Raneen Sawafta

A fire burns a tract of Amazon jungle near Porto Velho, Brazil September 9, 2019. Picture taken September 9, 2019. REUTERS/Bruno Kelly

A dead trout floats inside a farm cage at a fish hatchery in Tiquina village, Lake Titicaca, Bolivia, May 08, 2019. REUTERS/Manuel Seoane SEARCH "TITICACA CLIMATE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A waterspout is seen from the German NGO Sea-Eye migrant rescue ship 'Alan Kurdi' as it waits for further instructions after rescuing Tunisian migrants, in international waters off Malta in the central Mediterranean Sea, September 4, 2019. REUTERS/Darrin Zammit Lupi

A sign warns of the danger from polar bears in the town of Longyearbyen in Svalbard, Norway, August 3, 2019. REUTERS/Hannah McKay SEARCH "SVALBARD CLIMATE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A snake is seen while a tract of the Amazon jungle burns as it is cleared by loggers and farmers in Porto Velho, Brazil August 24, 2019. REUTERS/Ueslei Marcelino