Cork oak destroyed by the historic Filomena snowstorm is seen in Las Rozas, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Francisco Molina, head of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, works next to cork oak destroyed by the historic Filomena snowstorm in Las Rozas, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Employee of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, shows a cork oak germination in Alcala de Henares, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Francisco Molina, head of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, stands next to cork oak destroyed by the historic Filomena snowstorm in Las Rozas, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Seedlings of cork oak are seen in the laboratory of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, in Alcala de Henares, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Inmaculada Hernandez, researcher of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, works at laboratory in Alcala de Henares, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Cork oak destroyed by the historic Filomena snowstorm is seen in Las Rozas, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Employee of the agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, shows a branch of a cork oak destroyed by the historic Filomena snowstorm in Las Rozas, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

A seedling of cork oak are seen in the laboratory of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, in Alcala de Henares , Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Mar Ruiz Galea researcher of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, works at laboratory in Alcala de Henares, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Employee of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, shows a cork oak germination in Alcala de Henares, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

Francisco Molina, head of agroforestry department at Imidra, Madrid's rural, agroforestry and alimentation investigation institute, stands next to cork oak destroyed by the historic Filomena snowstorm in Las Rozas, Spain, February 10, 2021. Picture taken February 10, 2021. REUTERS/Juan Medina

A ballot paper for presidential election with the same surname and initials of two candidates, Yuriy Tymoshenko, Ukrainian lawmaker and Yulia Tymoshenko, leader of opposition Batkivshchyna party, is seen at a printing plant in Kiev, Ukraine March 21, 2019. Picture taken March 21, 2019. REUTERS/Gleb Garanich

Yuriy Tymoshenko, Ukrainian lawmaker and presidential candidate whose last name and initials, Y.V. Tymoshenko, are the same as Yulia Tymoshenko's, the leader of opposition Batkivshchyna party and a presidential candidate, speaks to Reuters journalists in his flat in Kiev, Ukraine March 21, 2019. Picture taken March 21, 2019. REUTERS/Sergei Karazy

Yuriy Tymoshenko, Ukrainian lawmaker and presidential candidate whose last name and initials, Y.V. Tymoshenko, are the same as Yulia Tymoshenko's, the leader of opposition Batkivshchyna party and a presidential candidate, speaks to Reuters journalists in his flat in Kiev, Ukraine March 21, 2019. Picture taken March 21, 2019. REUTERS/Sergei Karazy

Yuriy Tymoshenko, Ukrainian lawmaker and presidential candidate whose last name and initials, Y.V. Tymoshenko, are the same as Yulia Tymoshenko's, the leader of opposition Batkivshchyna party and a presidential candidate, speaks to Reuters journalists in his flat in Kiev, Ukraine March 21, 2019. Picture taken March 21, 2019. REUTERS/Sergei Karazy

Yuriy Tymoshenko, Ukrainian lawmaker and presidential candidate whose last name and initials, Y.V. Tymoshenko, are the same as Yulia Tymoshenko's, the leader of opposition Batkivshchyna party and a presidential candidate, speaks to Reuters journalists in his flat in Kiev, Ukraine March 21, 2019. Picture taken March 21, 2019. REUTERS/Sergei Karazy

A screen displays the microscopic image of an attempt to inseminate a dog egg at a lab of the biotech company Sinogene that specialises in dog cloning in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

Staff prepare a Beagle dog for surgery attempting to make it the surrogate mother of a clone of the dog Juice at a lab of the biotech company Sinogene in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

Owner He Jun poses with his dogs, nine-year-old Juice and its two-month-old clone, at his pet resort in Beijing, China November 26, 2018. Picture taken November 26, 2018. REUTERS/Jason Lee

Nine-year-old Juice looks at its two-month-old clone at He Jun's pet resort in Beijing, China November 26, 2018. Picture taken November 26, 2018. REUTERS/Jason Lee

A technician works with genome samples at a lab of the biotech company Sinogene that specialises in dog cloning, in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

Staff prepare a Beagle dog for surgery attempting to make it the surrogate mother of a clone of the dog Juice at a lab of the biotech company Sinogene in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

Veterinary doctors conduct a surgery on a Beagle dog in an attempt to make it the surrogate mother of a clone of the dog Juice at a lab of the biotech company Sinogene in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

A lab technician demonstrates gene-editing software at a lab of the biotech company Sinogene that specialises in dog cloning in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

Staff prepare a Beagle dog for surgery attempting to make it the surrogate mother of a clone of the dog Juice at a lab of the biotech company Sinogene in Beijing, China June 15, 2018. Picture taken June 15, 2018. REUTERS/Thomas Peter

Owner He Jun poses with his dogs, nine-year-old Juice and its two-month-old clone, at his pet resort in Beijing, China November 26, 2018. Picture taken November 26, 2018. REUTERS/Jason Lee

A staff member holds 24-day-old clone of Juice at the biotech company Sinogene in Beijing, China October 11, 2018. Picture taken October 11, 2018. REUTERS/Jason Lee

Sinogene CEO Mi Jidong (2nd R) and staff of the biotech company that specialises in animal cloning, hand over a one-month-old puppy, a clone of the nine-year-old Juice, to his owner He Jun (L) at the company's head office in Beijing, China, October 22, 2018. Picture taken October 22, 2018. REUTERS/Thomas Peter

Owner He Jun poses with a two-month-old clone of his dog Juice next to a movie poster showing source dog Juice, at his pet resort in Beijing, China November 21, 2018. Picture taken November 21, 2018. REUTERS/Jason Lee

A Beagle with the ID number NTR1917, who is the surrogate mother of the 24 day-old clone of Juice, shares an enclosure with its offspring at the biotech company Sinogene in Beijing, China October 11, 2018. Picture taken October 11, 2018. REUTERS/Jason Lee

Owner He Jun poses with a two-month-old clone of his dog Juice next to a movie poster showing source dog Juice, at his pet resort in Beijing, China November 21, 2018. Picture taken November 21, 2018. REUTERS/Jason Lee

Veterinary doctors conduct a pregnancy test on Beagle dog NTR1917, the surrogate mother of a clone of the dog Juice, at the biotech company Sinogene in Beijing, China September 10, 2018. Picture taken September 10, 2018. REUTERS/Jason Lee

Twenty-four-day old clone of Juice feeds off its surrogate mother, a Beagle dog with the ID number NTR1917, at the biotech company Sinogene in Beijing, China October 11, 2018. Picture taken October 11, 2018. REUTERS/Jason Lee

Airbus engineer Philipp Schulien holds a clone of an artificial intelligence bot named CIMON at the NASA News Annex in Florida, U.S., June 28, 2018. Picture taken on June 28, 2018. REUTERS/Joey Roulette

Bret Greenstein, IBM Global Vice President of Watson Internet of Things Offerings, holds a clone of an artificial intelligence bot named CIMON, at the Kennedy Space Center in Florida, U.S., June 28, 2018. Picture taken on June 28, 2018. REUTERS/Joey Roulette

Pictures of Cloned monkeys Zhong Zhong and Hua Hua are seen at a news conference at the Institute of Neuroscience of Chinese Academy of Sciences in Shanghai, China January 25, 2018, REUTERS/Aly Song

Pictures of Cloned monkeys Zhong Zhong and Hua Hua are seen at a news conference at the Institute of Neuroscience of Chinese Academy of Sciences in Shanghai, China January 25, 2018, REUTERS/Aly Song

Pictures of Cloned monkeys Zhong Zhong and Hua Hua are seen at a press conference at the Institute of Neuroscience of Chinese Academy of Sciences in Shanghai, China January 25, 2018, REUTERS/Aly Song

Pictures of Cloned monkeys Zhong Zhong and Hua Hua are seen at a press conference at the Institute of Neuroscience of Chinese Academy of Sciences in Shanghai, China January 25, 2018, REUTERS/Aly Song

Pictures of Cloned monkeys Zhong Zhong and Hua Hua are seen at a press conference at the Institute of Neuroscience of Chinese Academy of Sciences in Shanghai, China January 25, 2018, REUTERS/Aly Song

Cannabis plants are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Employees sort cannabis plant clones in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plants and clones are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

An employee sorts cannabis plant clones in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plant clones are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plants are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plant clones are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

An employee sorts cannabis plant clones in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Employees sort cannabis plant clones in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plants are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plants are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Employees sort cannabis plant clones in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plants are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Cannabis plants are seen in a greenhouse of Austrian cannabis producer Flowery Field in Brunn am Gebirge, Austria, May 4, 2017. The company produces about 25.000 cannabis clones per week and sellls them legally as ornamental plants. REUTERS/Leonhard Foeger

Customer Care Assistant and Production Assistant Marsha McKenna grooms marijuana plant clones at Tweed Marijuana Inc in Smith's Falls, Ontario, February 20, 2014. REUTERS/Blair Gable/File Photo

Clones of medicinal marijuana plants are pictured at Los Angeles Patients & Caregivers Group dispensary in West Hollywood, California U.S., October 18, 2016. Picture taken October 18, 2016. REUTERS/Mario Anzuoni/File Photo