A person relaxes during hot weather at the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain, September 7, 2021. REUTERS/Toby Melville 

A person relaxes during hot weather at the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain, September 7, 2021. REUTERS/Toby Melville 

People relax during hot weather at the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain, September 7, 2021. REUTERS/Toby Melville 

People relax during hot weather at the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain, September 7, 2021. REUTERS/Toby Melville 

People relax during hot weather at the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain, September 7, 2021. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Amadou Bathili, 50, a trainer who teaches how to build Tolou Keur gardens through the Tolou Keur programme, prepares a chicken cage at a newly built Tolou Keur garden in Boki Diawe department of Podor region, in an area which is part of the Great Green Wall of the Sahara and the Sahel area, in Senegal, July 10, 2021. Gardens known as 'Tolou Keur' hold plants and trees resistant to hot, dry climates, and are planted with circular beds that allow roots to grow inwards, trapping liquids and bacteria and improving water retention and composting. REUTERS/Zohra Bensemra SEARCH "BENSEMRA REFORESTATION" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

A woman in her back garden takes in dry clothes from her washing line during hot weather as locals from the Craigyhill area stack wooden palettes to construct Northern Ireland's highest ever Eleventh Night bonfire, ahead of the Twelfth of July celebrations held by members of Loyalist Orders in Larne, Northern Ireland June 26, 2021. Picture taken June 26, 2021. REUTERS/Clodagh Kilcoyne 

A resident relaxes in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, in London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a suspended transparent acrylic swimming pool, with the U.S. Embassy building seen behind, London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a suspended transparent acrylic swimming pool, with the U.S. Embassy building seen behind, London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a suspended transparent acrylic swimming pool, with the U.S. Embassy building seen behind, London, Britain May 27, 2021. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a transparent acrylic swimming pool suspended between two buildings, London, Britain May 27, 2021. REUTERS/Toby Melville 

Residents relax in the Embassy Gardens Sky Pool, a suspended transparent acrylic swimming pool, with the U.S. Embassy building seen behind, London, Britain May 27, 2021. REUTERS/Toby Melville 

The hedgerow ‘Plantscape’ exhibit of the Secret World of Plants festival is pictured at Kew Gardens in London, Britain, May 6, 2021. REUTERS/John Sibley 

A general view of the Saluting Battery at the Upper Barrakka Gardens overlooking Grand Harbour in Valletta, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative coronavirus disease (COVID-19) test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi 

People relax at the Upper Barrakka Gardens overlooking Grand Harbour in Valletta, as Malta may be one of the countries added to a 'green' list where UK travellers will be able to visit with a negative Covid-19 test to be shown before travel but no quarantine needed after returning from holiday, Malta May 4, 2021. REUTERS/Darrin Zammit Lupi 

Community organizer Jay Webb works on building a garden at George Floyd Square, after the first week in the trial of Derek Chauvin, who is facing murder charges in the death of George Floyd, in Minneapolis, Minnesota, U.S., April 3, 2021. REUTERS/Octavio Jones 

Community organizer Jay Webb works on building a garden at George Floyd Square, after the first week in the trial of Derek Chauvin, who is facing murder charges in the death of George Floyd, in Minneapolis, Minnesota, U.S., April 3, 2021. REUTERS/Octavio Jones 

Community organizer Jay Webb works on building a garden at George Floyd Square, after the first week in the trial of Derek Chauvin, who is facing murder charges in the death of George Floyd, in Minneapolis, Minnesota, U.S., April 3, 2021. REUTERS/Octavio Jones 

Community organizer Jay Webb works on building a garden at George Floyd Square, after the first week in the trial of Derek Chauvin, who is facing murder charges in the death of George Floyd, in Minneapolis, Minnesota, U.S., April 3, 2021. REUTERS/Octavio Jones 

Jay Webb works on building a garden at George Floyd Square after the fifth day of the trial for Derek Chauvin, who is facing murder charges in the death of George Floyd, in Minneapolis, Minnesota, U.S., April 2, 2021. REUTERS/Octavio Jones 

Dolls are seen holding syringes as part of a garden display about the coronavirus disease (COVID-19) and vaccines outside an apartment building in Washington, U.S., April 1, 2021. REUTERS/Carlos Barria 

A doll is seen holding a syringe as part of a garden display about the coronavirus disease (COVID-19) vaccines outside an apartment building in Washington, U.S., April 1, 2021. REUTERS/Carlos Barria 

A doll is seen holding a syringe as part of a garden display about the coronavirus disease (COVID-19) vaccines outside an apartment building in Washington, U.S., April 1, 2021. REUTERS/Carlos Barria 

Dolls dressed as healthcare workers are seen with syringes as part of an art installation about the coronavirus disease (COVID-19) and vaccines in a garden outside an apartment building in Washington, U.S., April 1, 2021. REUTERS/Carlos Barria TPX IMAGES OF THE DAY 

Flowers are seen at the Mary Seacole statue in the garden of St Thomas' Hospital as part of a day of reflection to mark the anniversary of Britain's first coronavirus disease (COVID-19) lockdown, in London, Britain March 23, 2021. REUTERS/Hannah McKay 

Cassie Burt, marketing and communications manager of Coven Garden Market Authority, prepares flowers during the day of reflection to mark the anniversary of Britain's first coronavirus disease (COVID-19) lockdown, at the New Coven Garden Flower Market in London, Britain, March 23, 2021. REUTERS/Tom Nicholson 

A customer browses plants at Lydstep Nurseries and garden centre, as coronavirus disease (COVID-19) restrictions in Wales begin to ease, in Lydstep, Britain March 22, 2021. REUTERS/Rebecca Naden REFILE- CORRECTING YEAR 

Enforcement agents remove from a tree a makeshift camp at Euston Square Gardens as Extinction Rebellion activists protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

An Extinction Rebellion activist is seen silhouetted on a tree at Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

An Extinction Rebellion activist is seen silhouetted on a tree at Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A protester is seen on a tree as Extinction Rebellion activists occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A protester gestures from a makeshift camp on a treetop as Extinction Rebellion activists occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A protester gestures from a makeshift camp on a treetop as Extinction Rebellion activists occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

Enforcement agents use a cherry picker to bring an Extinction Rebellion activist down from a makeshift camp on a tree, as other demonstrators occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A police officer detains a protester as Extinction Rebellion activists occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A police officer handcuffs a protester at a makeshift camp as Extinction Rebellion activists occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A police officer searches a protester at a makeshift camp as Extinction Rebellion activists occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

Enforcement agents are seen silhouetted as they use a cherry picker to bring Extinction Rebellion activists down from a makeshift camp on a tree, as other demonstrators occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

An enforcement agent is seen silhouetted on a tree as he begins to dismantle a makeshift camp of Extinction Rebellion activists, as other demonstrators occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

An Extinction Rebellion activist is seen silhouetted on a tree at a makeshift camp, as other demonstrators occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

Enforcement agents stand at a makeshift camp of Extinction Rebellion activists, as other demonstrators occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

An Extinction Rebellion activist waves on a tree at a makeshift camp, as other demonstrators occupy tunnels under Euston Square Gardens to protest against the HS2 high-speed railway, in London, Britain January 28, 2021. REUTERS/Toby Melville 

A man smokes a marijuana joint outside Mexico's Senate building at the protest cannabis garden of the Cannabico Mexican Movement in Mexico City, Mexico November 19, 2020. REUTERS/Carlos Jasso 

Marijuana plants placed in shoes are seen next to Mexico's Senate building at the protest cannabis garden of the Cannabico Mexican Movement in Mexico City, Mexico November 19, 2020. REUTERS/Carlos Jasso 

A man smokes a marijuana joint outside Mexico's Senate building at the protest cannabis garden of the Cannabico Mexican Movement in Mexico City, Mexico November 19, 2020. REUTERS/Carlos Jasso 

Marijuana leaves are seen next to Mexico's Senate building at the protest cannabis garden of the Cannabico Mexican Movement in Mexico City, Mexico November 19, 2020. REUTERS/Carlos Jasso 

Marijuana leaves are seen next to Mexico's Senate building at the protest cannabis garden of the Cannabico Mexican Movement in Mexico City, Mexico November 19, 2020. REUTERS/Carlos Jasso 

A blanket with a marijuana plant logo and the word peace, is seen next to Mexico's Senate building in call for legalization at the protest cannabis garden of the Cannabico Mexican Movement in Mexico City, Mexico September 24, 2020. REUTERS/Carlos Jasso 

A marijuana user smokes inside a protest cannabis garden next to Mexico's Senate building during a call for legalization, using the garden as a tolerant and safe place to smoke in Mexico City, Mexico September 24, 2020. REUTERS/Carlos Jasso 

A marijuana user smokes inside a protest cannabis garden next to Mexico's Senate building, during a call for legalization, using the garden as a tolerant and safe place to smoke in Mexico City, Mexico September 24, 2020. REUTERS/Carlos Jasso 

Marijuana users smoke inside a protest cannabis garden next to Mexico's Senate building during a call for legalization, using the garden as a tolerant and safe place to smoke in Mexico City, Mexico September 24, 2020. REUTERS/Carlos Jasso 

Activist and volunteer, part of the Cannabico Mexican Movement, waters marijuana plants, inside the protest cannabis garden next to Mexico's Senate building during a call for legalization in Mexico City, Mexico September 24, 2020. REUTERS/Carlos Jasso 

Activist and volunteer, part of the Cannabico Mexican Movement, plants marijuana plants, inside the protest cannabis garden next to Mexico's Senate building during a call for legalization in Mexico City, Mexico September 24, 2020. REUTERS/Carlos Jasso