Instructions to check radiation levels are seen while a chef dispatched from South Korea prepares boxed meals for its athletes for the country's Tokyo 2020 Olympic Games athletes, at a hotel in Urayasu, Chiba Prefecture, Japan, July 26, 2021. REUTERS/Kim Kyung-Hoon

A radiation dosimeter is seen on a table at a kitchen where chefs dispatched from South Korea prepare boxed meals for the country's Tokyo 2020 Olympic Games athletes, at a hotel in Urayasu, Chiba Prefecture, Japan, July 26, 2021. REUTERS/Kim Kyung-Hoon

Depuis des années, l'Australie se bat pour maintenir la Grande Barrière hors de la liste "en danger", une étape qui pourrait potentiellement conduire à sa radiation comme site classé au patrimoine mondial de l’Unesco.

A radiation monitoring post measuring a radiation level of 0.089 microsievert per hour is seen along the route of the Tokyo 2020 Olympic torch relay, amid the coronavirus disease (COVID-19) pandemic, on the second day of the relay in Fukushima, Japan March 26, 2021. REUTERS/Issei Kato

A Geiger counter, measuring a radiation level of 0.091 microsieverts per hour, is seen next to flags promoting the torch relay of the Tokyo 2020 Olympic Games at a park in Iwaki, Fukushima prefecture, Japan, March 24, 2021. REUTERS/Kim Kyung-Hoon

U.S. President Joe Biden is accompanied by Dr. Arnab Chakravarti, chair of Department of Radiation Oncology, and U.S. Rep. Joyce Beatty (D-OH) while viewing a brain scanning and imaging device as he visits the James Cancer Hospital and Solove Research Institute in Columbus, Ohio, U.S., March 23, 2021. REUTERS/Leah Millis

U.S. President Joe Biden listens to Dr. Arnab Chakravarti, chair of Department of Radiation Oncology, as U.S. Rep. Joyce Beatty (D-OH) stands by during a visit to the James Cancer Hospital and Solove Research Institute in Columbus, Ohio, U.S., March 23, 2021. REUTERS/Leah Millis

A Geiger counter shows a radiation level of 113 microsieverts per hour in front of the damaged No. 1 reactor building at the tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan March 1, 2021. 2021. Picture taken March 1, 2021. REUTERS/Sakura Murakami

A Geiger counter shows a radiation level of 231 microsieverts per hour near the damaged No. 3 reactor building at the tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan March 1, 2021. Picture taken March 1, 2021. REUTERS/Sakura Murakami

Maps showing the air dose radiation levels in Japan after the March 11, 2011 earthquake in Japan.

An aerial view shows Sakae Kato walking Pochi, his dog that he rescued four years ago, on an empty road between restricted zones in Namie, Fukushima Prefecture, Japan, February 20, 2021. A decade ago, Kato stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I don't want to leave, I like living in these mountains," Kato said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES Picture taken with a drone. TPX IMAGES OF THE DAY

Sakae Kato walks past workers checking radiation levels on a road near his house as he walks Pochi, his dog which he rescued four years ago, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An aerial view shows Sakae Kato's house standing close to a field which is being decontaminated in a restricted zone in Namie, Fukushima Prefecture, Japan, February 21, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, Kato stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I don't want to leave, I like living in these mountains," Kato said. REUTERS/Kim Kyung-Hoon Picture taken with a drone. SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato prepares food for abandoned and feral cats at a barn in a restricted zone in Namie, Fukushima Prefecture, Japan, February 21, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato lies in bed next to Charm, a cat who he rescued five years ago who is infected with feline leukemia virus, at his home in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon TPX IMAGES OF THE DAY SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato walks past black bags containing contaminated soil from the fallout of the Fukushima nuclear plant, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 21, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, Kato stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I don't want to leave, I like living in these mountains," Kato said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato holds Mokkun, a rescued cat, while an animal rescue activist applies an ointment onto its mouth at Kato's home, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 21, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato cleans cat cages at his home, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his house and another empty building on his property. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later."REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A room in Sakae Kato's home is filled with pet supplies for cats and dogs, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato plays with cats that he rescued, called Mokkun and Charm, who are both infected with feline leukemia virus, at his home, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato feeds wild boars in front of his home, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. A decade ago, Kato stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I don't want to leave, I like living in these mountains," Kato said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Hisae Unuma works on her farm, where she has settled down after being evacuated from her home in Fukushima which was 2.5 km away from the crippled Fukushima nuclear power plant and in a restricted zone, in Kazu, Saitama prefecture, Japan, February 17, 2021. Unuma won't return even if the government scrapes the radioactive soil off her fields. Radiation levels around her house are around 20 times the background level in Tokyo, according to a dosimeter reading carried out by Reuters. Only the removal of Fukushima's radioactive cores will make her feel safe, a task that will take decades to complete. "Never mind the threat from earthquakes, those reactors could blow if someone dropped a tool in the wrong place," she said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato eats instant noodles for dinner at his home in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Cats that were rescued by Sakae Kato, rest in a cage at Kato's home, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato's home stands in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, Kato stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I don't want to leave, I like living in these mountains," Kato said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato prepares to feed wild boars in front of his home, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. A decade ago, Kato stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I don't want to leave, I like living in these mountains," Kato said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Sakae Kato holds a flash light in his mouth as he climbs up a ladder onto the second floor of an abandoned house that Kato converted into a cat shelter, on his property in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A radiation dosimeter, brought by a Reuters journalist, shows a reading of 1.89 microsievert per hour at Hisae Unuma's family graveyard, near her house that she lived in before being evacuated, as Unuma visits the graveyard on the anniversary of her husband's death in a restricted zone in Futaba, Fukushima prefecture, Japan, February 23, 2021. Unuma who's home where she lived, is 2.5 km away from the crippled Fukushima nuclear power plant, won't return even if the government scrapes the radioactive soil off her fields. Radiation levels around her house are around 20 times the background level in Tokyo, according to a dosimeter reading carried out by Reuters. Only the removal of Fukushima's radioactive cores will make her feel safe, a task that will take decades to complete. "Never mind the threat from earthquakes, those reactors could blow if someone dropped a tool in the wrong place," she said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Hisae Unuma wears a protective suit as she walks past an incinerator used to burn debris collected in the Fukushima clean up, which was built in a rural village near Unuma's collapsing home where she lived before being evacuated, in a restricted zone in Futaba, Fukushima Prefecture, Japan, February 23, 2021. Unuma, who fled as the cooling system at Tokyo Electric Power Co's nuclear plant 2.5 km away failed and its reactors began to melt down, won't return even if the government scrapes the radioactive soil off her fields. Radiation levels around her house are around 20 times the background level in Tokyo, according to a dosimeter reading carried out by Reuters. Only the removal of Fukushima's radioactive cores will make her feel safe, a task that will take decades to complete. "Never mind the threat from earthquakes, those reactors could blow if someone dropped a tool in the wrong place," she said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Hisae Unuma wears a protective suit as she prays at her family's graveyard near her home that she lived in before being evacuated, which is 2.5 km away from the crippled Fukushima nuclear power plant, as she visits the house on the anniversary of her husband's passing in a restricted zone in Futaba, Fukushima prefecture, Japan, February 23, 2021. Unuma won't return even if the government scrapes the radioactive soil off her fields. Radiation levels around her house are around 20 times the background level in Tokyo, according to a dosimeter reading carried out by Reuters. Only the removal of Fukushima's radioactive cores will make her feel safe, a task that will take decades to complete. "Never mind the threat from earthquakes, those reactors could blow if someone dropped a tool in the wrong place," she said. REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A feral cat, that was disturbed by noise as he ate cat food left out by Sankae Kato, jumps out of a hole from a storage shed on Kato's property, at a restricted zone in Namie, Fukushima Prefecture, Japan, February 21, 2021. Kato looks after 41 cats in his home and another empty building on his property and leaves food for feral cats in a storage shed he heats with a paraffin stove. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIE

Sakae Kato pets a rescued cat at his house, in a restricted zone in Namie, Fukushima Prefecture, Japan, February 20, 2021. Kato looks after 41 cats in his home and another empty building on his property. A decade ago, he stayed behind to rescue cats abandoned by neighbours who fled the radiation clouds belching from the nearby Fukushima nuclear plant. He won't leave. "I want to make sure I am here to take care of the last one," Kato said. "After that I want to die, whether that be a day or hour later." REUTERS/Kim Kyung-Hoon SEARCH "FUKUSHIMA KYUNG-HOON" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Maiga Radiatou, 21, who fled from attacks of armed militants in Sahel region of Soum and who will not be able to vote in Burkina Faso's presidential election on Sunday carries her seven months daughter Sameuna as she stands at a courtyard of the house in an informal camp for displaced people on the outskirts of Ouagadougou, Burkina Faso November 19, 2020. Picture taken November 19, 2020. REUTERS/Zohra Bensemra

Maiga Radiatou, 21, who fled from attacks of armed militants in Sahel region of Soum and who will not be able to vote in Burkina Faso's presidential election on Sunday carries her seven months daughter Sameuna as she stands at a courtyard of the house in an informal camp for displaced people on the outskirts of Ouagadougou, Burkina Faso November 19, 2020. Picture taken November 19, 2020. REUTERS/Zohra Bensemra

Mirko Meuche, owner of Maerz restaurant holds a heating coil used in the heating system for the benches made of radiators that keep guests warm while dining outside in cold weather, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

A gas-powered heating bench made of a radiator, that keeps guests warm while they dine outside in cold weather, is pictured at Maerz restaurant, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

A gas-powered heating bench made of a radiator, that keeps guests warm while they dine outside in cold weather, is pictured at Maerz restaurant, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

Guests of Maerz restaurant sit on gas-powered heating benches made of radiators, that allow dining outside even in cold weather, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

Guests of Maerz restaurant sit on gas-powered heating benches made of radiators, that allow dining outside even in cold weather, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

Guests of Maerz restaurant sit on gas-powered heating benches made of radiators, that allow dining outside even in cold weather, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

Guests of Maerz restaurant sit on gas-powered heating benches made of radiators, that allow dining outside even in cold weather, as the spread of the coronavirus disease (COVID-19) continues, in Berlin, Germany, October 16, 2020. REUTERS/Fabrizio Bensch

Information booklets are placed on a radiator in an apartment block on the last day of a weeklong nationwide vote on constitutional reforms in Moscow, Russia July 1, 2020. REUTERS/Maxim Shemetov

A geiger counter measures a radiation level at a site of fire burning in the exclusion zone around the Chernobyl nuclear power plant, outside the village of Rahivka, Ukraine April 5, 2020. Picture taken April 5, 2020. REUTERS/Yaroslav Yemelianenko

A geiger counter, measuring the radiation level of 0.275 Microsievert per hour, is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Big black plastic bags containing radiated soil are seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Big black plastic bags containing radiated soil, leaves and debris from the decontamination operation are collected next to a graveyard in Futaba Town, inside the exclusion zone around tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima Prefecture, Japan February 20, 2020. Picture taken February 20, 2020. REUTERS/Issei Kato

Workers are seen amid big black plastic bags containing radiated soil, leaves and debris from the decontamination operation at a temporary storage site in Futaba Town, inside the exclusion zone around tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima Prefecture, Japan February 20, 2020. Picture taken February 20, 2020. REUTERS/Issei Kato

A man carrying car radiators walks past burning tires set as a barricade during protests in Port-au-Prince, Haiti February 19, 2020. REUTERS/Andres Martinez Casares

The remains of a mattress, a bedside table, a ventilator and a radiator that used to be inside a guest tent are scattered on the scorched ground at the Kangaroo Valley Bush Retreat after a wildfire in Kangaroo Valley, New South Wales, Australia, January 23, 2020. REUTERS/Thomas Peter

Employees of Tokyo Electric Power Co's (TEPCO) wearing protective suits and masks are seen inside a radiation filtering Advanced Liquid Processing Systems, known as ALPS, at tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan January 15, 2020. Picture taken January 15, 2020. REUTERS/Aaron Sheldrick

A man walks past banners promoting safety about radiation from the Fukushima nuclear plant at a press center of G20 Foreign Ministers meeting in Nagoya, Japan, November 22, 2019. REUTERS/Kim Kyung-Hoon/Pool

Banners promoting safety about radiation from the Fukushima nuclear plant are displayed at a press center of G20 Foreign Ministers meeting in Nagoya, Japan, November 22, 2019. REUTERS/Kim Kyung-Hoon/Pool

Leaflets written in Korean (Bottom R) promoting safety in relation with radiation from the Fukushima nuclear plant are displayed at a press center of G20 Foreign Ministers meeting in Nagoya, Japan, November 22, 2019. REUTERS/Kim Kyung-Hoon/Pool

Protesters hold a placard saying "For our children" during a protest against abuse in an institution for children with special needs after photographs emerged of children tied to beds and radiators, in Sarajevo, Bosnia and Herzegovina November 21, 2019. REUTERS/Dado Ruvic

Protesters hold placards saying "What if it was about your children?", "Is it the 12th or 21st century?", "We will not surrender our children" and "Children have rights too" during a protest against abuse in an institution for children with special needs after photographs emerged of children tied to beds and radiators in Sarajevo, Bosnia and Herzegovina November 21, 2019. REUTERS/Dado Ruvic

Protesters hold placards during protest against abuse in an institution for children with special needs after photographs emerged of children tied to beds and radiators in Sarajevo, Bosnia and Herzegovina November 21, 2019. REUTERS/Dado Ruvic

A bird sits on a radiation sign at the uranium ore dump near the town of Mailuu-Suu, Kyrgyzstan, October 23, 2019. Picture taken October 23, 2019. REUTERS/Pavel Mikheyev