U.S. First lady Jill Biden holds a dandelion before boarding the Marine One helicopter on the Ellipse near the White House in Washington, U.S. April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden stops to pick a dandelion for first lady Jill Biden as they walk to board the Marine One helicopter on the Ellipse near the White House in Washington, U.S. April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden stops to pick a dandelion for first lady Jill Biden as they walk to board the Marine One helicopter on the Ellipse near the White House in Washington, U.S. April 29, 2021. REUTERS/Jonathan Ernst

U.S. first lady Jill Biden reacts as President Joe Biden stops to pick a dandelion for her as they walk to board the Marine One helicopter on the Ellipse near the White House in Washington, U.S. April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden stops to pick a dandelion for first lady Jill Biden as they walk to board the Marine One helicopter on the Ellipse near the White House in Washington, U.S., April 29, 2021. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

A detail photo shows a dandelion from the lawn of the Ellipse, where U.S. President Joe Biden had stopped to pick a one similar for first lady Jill Biden as they boarded the Marine One helicopter on the Ellipse near the White House in Washington, U.S. April 29, 2021. REUTERS/Jonathan Ernst

In a combination photo, U.S. President Joe Biden stops to pick a dandelion for first lady Jill Biden as they walk to board the Marine One helicopter on the Ellipse near the White House in Washington, U.S. April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden bends down to pick a dandelion for first lady Jill Biden while walking to Marine One on the Ellipse as they depart for travel to Atlanta, Georgia to promote plans to rebuild the U.S. economy and mark his 100th day in office, from the White House in Washington, U.S., April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden hands a dandelion to first lady Jill Biden he picked while walking to Marine One on the Ellipse as they depart for travel to Atlanta, Georgia to promote plans to rebuild the U.S. economy and mark his 100th day in office, from the White House in Washington, U.S., April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden bends down to pick a dandelion for first lady Jill Biden board Marine One on the Ellipse as they depart for travel to Atlanta, Georgia to promote plans to rebuild the U.S. economy and mark his 100th day in office, after walking from the White House in Washington, U.S., April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden bends down to pick a dandelion for first lady Jill Biden while walking to Marine One on the Ellipse as they depart for travel to Atlanta, Georgia to promote plans to rebuild the U.S. economy and mark his 100th day in office, from the White House in Washington, U.S., April 29, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden bends down to pick a dandelion for first lady Jill Biden while walking to Marine One waiting on The Ellipse as they depart for travel to Atlanta, Georgia to promote plans to rebuild the U.S. economy and mark his 100th day in office, from the White House in Washington, U.S., April 29, 2021. REUTERS/Jonathan Ernst

Tennis - Australian Open - Melbourne Park, Melbourne, Australia, February 11, 2021 A ball boy tries to remove dandelions from the racket of Britain's Heather Watson during her second round match against Estonia's Anett Kontaveit REUTERS/Jaimi Joy

Tennis - Australian Open - Melbourne Park, Melbourne, Australia, February 11, 2021 Britain's Heather Watson tries to remove dandelions from her racquet during her second round match against Estonia's Anett Kontaveit REUTERS/Jaimi Joy

A person walks past the Dandelion Gift Shop, ahead of its reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Christmas postcards are pictured at Dandelion Gift Shop, ahead of its reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Christmas decorations are pictured at Dandelion Gift Shop, ahead of its reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Christmas decorations are pictured at Dandelion Gift Shop, ahead of its reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Christmas decorations are pictured at Dandelion Gift Shop, ahead of its reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Lisa Reece, owner of Dandelion Gift Shop, prepares her shop for Christmas and reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Lisa Reece, owner of Dandelion Gift Shop, prepares her shop for Christmas and reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Lisa Reece, owner of Dandelion Gift Shop, prepares her shop for Christmas and reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Lisa Reece, owner of Dandelion Gift Shop, prepares her shop for Christmas and reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Lisa Reece, owner of Dandelion Gift Shop, prepares her shop for Christmas and reopening after lockdown, amid the coronavirus disease (COVID-19) outbreak, in Frodsham, Britain, November 19, 2020. REUTERS/Molly Darlington

Lauren Norton, a senior graduating from Medway High School, blows dandelion seeds while posing for photographs for Reuters in her prom dress, after her prom was cancelled due to the coronavirus disease (COVID-19) outbreak, in Choate Park in Medway, Massachusetts, U.S. May 17, 2020. Picture taken May 17, 2020. REUTERS/Faith Ninivaggi

Mila Contreras-Godfrey, a graduating senior at Beaver Country Day School, holds a dandelion while posing for photographs for Reuters in her prom dress, after prom was cancelled due to the coronavirus disease (COVID-19) outbreak, at Larz Anderson Park in Brookline, Massachusetts, U.S. May 22, 2020. Picture taken May 22, 2020. REUTERS/Faith Ninivaggi

Layla Adornetto and Elizabeth Adornetto blow seeds from dandelions at the Bella-B Mobile Home Park, where owner Yacov Sinai decreased rents by $225, or about 27%, to help residents in difficult economic situations due to the coronavirus disease (COVID-19) outbreak, in Seattle, Washington, U.S. April 6, 2020. REUTERS/David Ryder TPX IMAGES OF THE DAY

A dry field is pictured close to Liebenwalde, Germany, April 25, 2019. REUTERS/Hannibal Hanschke

A butterfly is pictured as it sits on a flower on a field near the village of Agia Anna, Cyprus March 22, 2019. REUTERS/ Yiannis Kourtoglou

A butterfly is pictured as it sits on a flower on a field near the village of Agia Anna, Cyprus March 22, 2019. REUTERS/ Yiannis Kourtoglou

A glass of sun tea made with edible wild ground ivy, dandelion flowers, lemon balm, peppermint and catnip steeps is seen at a "Forage and Feast" walk, where people learn how to forage edible wild plant species growing in the woods and in common surroundings and how to cook them, at the Gatherwild Ranch in Germantown, New York, U.S., May 9, 2018. Picture taken May 9, 2018. REUTERS/Mike Segar

Hayden Stebbins, an ethnobotanist and clinical herbalist with a focus on invasive species and food production, holds an edible dandelion plant as he leads a "Forage and Feast" walk to teach people how to forage edible wild plant species growing in the woods and in common surroundings and how to cook them, at the Gatherwild Ranch in Germantown, New York, U.S., May 9, 2018. Picture taken May 9, 2018. REUTERS/Mike Segar

A Taraxa Gum winter tyre, made of dandelion rubber instead of caoutchouc is pictured at the fair stand of Continental AG, a German automotive manufacturing company specialized in tyres, brakes and car safety during the Hannover Fair in Hanover, Germany, April 25, 2016. REUTERS/Wolfgang Rattay

A Taraxa Gum winter tyre, made of dandelion rubber instead of caoutchouc is pictured at the fair stand of Continental AG, a German automotive manufacturing company specialized in tyres, brakes and car safety during the Hannover Fair in Hanover, Germany, April 25, 2016. REUTERS/Wolfgang Rattay

A Taraxa Gum winter tyre, made of dandelion rubber instead of caoutchouc is pictured at the fair stand of Continental AG, a German automotive manufacturing company specialized in tyres, brakes and car safety during the Hannover Fair in Hanover, Germany, April 25, 2016. REUTERS/Wolfgang Rattay

A Taraxa Gum winter tyre, made of dandelion rubber instead of caoutchouc is pictured at the fair stand of Continental AG, a German automotive manufacturing company specialized in tyres, brakes and car safety during the Hannover Fair in Hanover, Germany, April 25, 2016. REUTERS/Wolfgang Rattay

A Taraxa Gum winter tyre, made of dandelion rubber instead of caoutchouc is pictured at the fair stand of Continental AG, a German automotive manufacturing company specialized in tyres, brakes and car safety during the Hannover Fair in Hanover, Germany, April 25, 2016. REUTERS/Wolfgang Rattay

Flowers are pictured in front of the snow covered Bettelwurf mountain summit in the western Austrian village of Absam April 29, 2015. REUTERS/Dominic Ebenbichler

A dandelion catches the sun beside a 'YES' campaign placard on the Isle of Lewis in the Outer Hebrides September 11, 2014. The referendum on Scottish independence will take place on September 18, when Scotland will vote whether or not to end the 307-year-old union with the rest of the United Kingdom. REUTERS/Cathal McNaughton (BRITAIN - Tags: POLITICS ELECTIONS)

Project manager Dirk Pruefer checks dandelion plants at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

Project manager Dirk Pruefer checks dandelion plants at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

Project manager Dirk Pruefer poses beside dandelion plants at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

An employee prepares a dandelion plant at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY
- Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

An employee prepares a dandelion plant at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

An employee prepares a dandelion plant at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY
- Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A dandelion plant is seen at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY
- Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A dandelion plant is seen at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A dandelion plant is seen at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A piece of rubber made from dandelion plants is seen at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A dandelion plant is seen at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

Dandelion plants are seen in glasses at a greenhouse at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

A piece of rubber made from dandelion plants is seen at the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Muenster August 14, 2014. Research teams are competing across the world to breed a type of dandelion native to Kazakhstan whose taproot yields a milky fluid with tyre-grade rubber particles in it. Global tyre makers such as industry leader Bridgestone Corp and No.4 player Continental AG believe they are in for rich pickings and are backing such research to the tune of millions of dollars. Picture taken on August 14, 2014. To match Feature DANDELION-RUBBER/ REUTERS/Ina Fassbender (GERMANY
- Tags: TRANSPORT BUSINESS SOCIETY SCIENCE TECHNOLOGY)

Vlado Kostov, 47, poses next to his sculptures of dandelions in Skopje February 27, 2014. Kostov, a Macedonian artist, makes sculptures from scrap metal he collects at a junkyard. Picture taken February 27, 2014. REUTERS/Ognen Teofilovski (MACEDONIA - Tags: SOCIETY)

A woman looks at the sculpture "Dandelion" by Harry Bertoia, at the Sotheby's gallery in New York, February 14, 2014. REUTERS/Eduardo Munoz (UNITED STATES - Tags: SOCIETY)

Cows graze on dandelion flowers on the Prooveta pasture on the first day of the season in Gruyeres, western Switzerland, May 8, 2013. During the summer grazing season, starting mid-May to mid-October, the fifth generation Murith family produce a distinctive mountain pasture Gruyere cheese. Each wheel of cheese weighs between 25-40 kilograms, and takes a minimum of six months to mature. Some 200 wheels are produced each year from the unpasteurized milk from his herd of cows and sold locally. Picture taken May 8, 2013. REUTERS/Denis Balibouse (SWITZERLAND - Tags: AGRICULTURE SOCIETY FOOD TPX IMAGES OF THE DAY)

A bee is covered with pollen as it approaches a dandelion blossom on a lawn in Klosterneuburg April 29, 2013. The European Commission said on Monday it would go ahead and impose a temporary ban on three of the world's most widely used pesticides because of fears they harm bees, despite EU governments failing to agree on the issue. In a vote on Monday, EU officials could not decide whether to impose a two-year ban - with some exceptions - on a class of pesticides known as neonicotinoids, produced mainly by Germany's Bayer and Switzerland's Syngenta. The Commission proposed the ban in January after EU scientists said the chemicals posed an acute risk to honeybees, which pollinate many of the crops grown commercially in Europe. RREUTERS/Heinz-Peter Bader (AUSTRIA - Tags: AGRICULTURE ANIMALS ENVIRONMENT)

A bee collects pollen from a dandelion blossom on a lawn in Klosterneuburg April 29, 2013. The European Commission said on Monday it would go ahead and impose a temporary ban on three of the world's most widely used pesticides because of fears they harm bees, despite EU governments failing to agree on the issue. In a vote on Monday, EU officials could not decide whether to impose a two-year ban - with some exceptions - on a class of pesticides known as neonicotinoids, produced mainly by Germany's Bayer and Switzerland's Syngenta. The Commission proposed the ban in January after EU scientists said the chemicals posed an acute risk to honeybees, which pollinate many of the crops grown commercially in Europe. R REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: AGRICULTURE ANIMALS ENVIRONMENT)

A bee is covered with pollen as it approaches a dandelion blossom on a lawn in Klosterneuburg April 29, 2013. The European Commission said on Monday it would go ahead and impose a temporary ban on three of the world's most widely used pesticides because of fears they harm bees, despite EU governments failing to agree on the issue. In a vote on Monday, EU officials could not decide whether to impose a two-year ban - with some exceptions - on a class of pesticides known as neonicotinoids, produced mainly by Germany's Bayer and Switzerland's Syngenta. The Commission proposed the ban in January after EU scientists said the chemicals posed an acute risk to honeybees, which pollinate many of the crops grown commercially in Europe. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: AGRICULTURE ANIMALS ENVIRONMENT)

Dandelion (Taraxacum seed) heads are seen in Kherbet Kanafar in Bekaa Valley April 14, 2013. REUTERS/Ali Hashisho (LEBANON - Tags: ENVIRONMENT)

Four-year-old Milagros, whose mother, Valeria Cigara, is in prison for robbery, blows a dandelion outside her home in La Plata, August 31, 2012. Cigara, 28, is in jail awaiting trial for her fourth case of robbery, admits that she suffers from drug addiction and has requested treatment from the prison system. She was pregnant with Milagros during her first jail term in 2007 and gave birth to and raised her daughter in the prison until she was two. Argentine law allows women prisoners to raise their infant children in jail until the age of four, after which they must leave to live with family or in a state home. Picture taken August 31, 2012. REUTERS/Carolina Camps (ARGENTINA - Tags: SOCIETY CRIME LAW)