Workers carry harvested lettuce on the Gorgens Family Trust farm which has been struggling to irrigate the crops due to ongoing power cuts as a result of struggling power utility Eskom's inability to deliver electricity to South Africans, in Cape Town, South Africa, January 24, 2023. REUTERS/Esa Alexander 

Workers carry harvested lettuce on the Gorgens Family Trust farm which has been struggling to irrigate the crops due to ongoing power cuts as a result of struggling power utility Eskom's inability to deliver electricity to South Africans, in Cape Town, South Africa, January 24, 2023. REUTERS/Esa Alexander 

Lettuces wrapped in plastic foils are displayed for sale in an Utile supermarket in La Verrie, France, December 9, 2022. REUTERS/Stephane Mahe 

Lettuce grows in Imperial Valley, California, U.S., December 5, 2022. REUTERS/Caitlin Ochs 

Water droplets line a lettuce leaf in Imperial Valley, California, U.S., December 5, 2022. REUTERS/Caitlin Ochs 

An irrigation pipe runs in front of a field of lettuce in Imperial Valley, California, U.S., December 4, 2022. REUTERS/Caitlin Ochs 

Sameer Ahmed, 65, a Syrian migrant puts the fertilizer in the molding in the first step of plantings project of rooftop farming in the Giza suburb on 6th of October. On a rooftop building, several Syrian migrants plant lettuce to sell in supermarkets, creating income for their families and making buildings greener by the International Organization of Migration (IOM) in collaboration with Schaduf, a local smart farming company, in Giza, Egypt November 3, 2022. REUTERS/Fatma Fahmy 

Sameer Ahmed, 65, a Syrian migrant puts water to sand in the third step of plantings project of rooftop farming in the Giza suburb on 6th of October. On a rooftop building, several Syrian migrants plant lettuce to sell in supermarkets, creating income for their families and making buildings greener by the International Organization of Migration (IOM) in collaboration with Schaduf, a local smart farming company, in Giza, Egypt November 3, 2022. REUTERS/Fatma Fahmy 

Sameer Ahmed, 65, a Syrian migrant puts water to sand in the third step of plantings project of rooftop farming in the Giza suburb on 6th of October. On a rooftop building, several Syrian migrants plant lettuce to sell in supermarkets, creating income for their families and making buildings greener by the International Organization of Migration (IOM) in collaboration with Schaduf, a local smart farming company, in Giza, Egypt November 3, 2022. REUTERS/Fatma Fahmy 

Sameer Ahmed, 65, puts the a green batavia lettuce seeds (Othilie RZ) inside sand in the 2nd step of plantings project of rooftop farming in the Giza suburb on 6th of October. On a rooftop building, several Syrian migrants plant lettuce to sell in supermarkets, creating income for their families and making buildings greener by the International Organization of Migration (IOM) in collaboration with Schaduf, a local smart farming company, in Giza, Egypt November 3, 2022. REUTERS/Fatma Fahmy 

Sameer Ahmed, 65, a Syrian migrant puts water to sand in the third step of plantings project of rooftop farming in the Giza suburb of 6th on 6th of October. On a rooftop building, several Syrian migrants plant lettuce to sell in supermarkets, creating income for their families and making buildings greener by the International Organization of Migration (IOM) in collaboration with Schaduf, a local smart farming company, in Giza, Egypt November 3, 2022. REUTERS/Fatma Fahmy 

A view of green Batavia lettuce (Ottilie RZ) after growing little bit, takes one month that moves to the second stage of plantings project of rooftop farming in the Giza suburb on 6th of October. On a rooftop building, several Syrian migrants plant lettuce to sell in supermarkets, creating income for their families and making buildings greener by the International Organization of Migration (IOM) in collaboration with Schaduf, a local smart farming company, in Giza, Egypt November 3, 2022. REUTERS/Fatma Fahmy 

Sr. Anna Bakutara carries lettuce leaves she picked from her polytunnel on the farm at St. Mary's Abbey, an enclosed order of Trappistine nuns, in Glencairn, Ireland August 30, 2022. The monastery uses green energy and sustainable farming to try to make itself self sufficient for both heating and food. REUTERS/Clodagh Kilcoyne 

Sr. Anna Bakutara holds lettuce in her lettuce patch at St. Mary's Abbey, an enclosed order of Trappistine nuns, in Glencairn, Ireland August 30, 2022. The monastery uses green energy and sustainable farming to try to make itself self sufficient for both heating and food. REUTERS/Clodagh Kilcoyne 

Sr. Anna Bakutara picks lettuce leaves in her polytunnel on the farm at St. Mary's Abbey, an enclosed order of Trappistine nuns, in Glencairn, Ireland August 30, 2022. The monastery uses green energy and sustainable farming to try to make itself self sufficient for both heating and food. REUTERS/Clodagh Kilcoyne 

Murshida Begum, 35, her daughter and neighbours cut locally grown leaves into thin pieces to tie Water Lettuce seedling balls, at their home in Pirojpur, Bangladesh, August 18, 2022. REUTERS/Mohammad Ponir Hossain SEARCH "HOSSAIN FLOATING FARMS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Murshida Begum, 35, shows her hands filled with dark spots caused by continuously making balls of Water Lettuce seedlings, in Pirojpur district, Bangladesh, August 16, 2022. REUTERS/Mohammad Ponir Hossain SEARCH "HOSSAIN FLOATING FARMS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Murshida Begum, 35, makes balls of Water Lettuce seedlings, at home in Pirojpur district, Bangladesh, August 16, 2022. REUTERS/Mohammad Ponir Hossain SEARCH "HOSSAIN FLOATING FARMS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Murshida Begum, 35, makes water lettuce seedling balls, at her home in Pirojpur district, Bangladesh, August 16, 2022. REUTERS/Mohammad Ponir Hossain SEARCH "HOSSAIN FLOATING FARMS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A man sells lettuce on a street near the municipal market in the popular neighborhood of Catia in Caracas, Venezuela June 11, 2022. Picture taken June 11, 2022. REUTERS/Leonardo Fernandez Viloria 

A protester holds a bag with lettuce while opening a fuel tank cap on top of a tractor during a demonstration against fuel and fertilizer costs affected by the Russian invasion of Ukraine, in Athens, Greece, March 18, 2022. REUTERS/Louiza Vradi 

Farmers work on a lettuce plot at Faisal Farm in Jerash, Jordan February 21, 2022. Picture taken February 21, 2022. REUTERS/Jehad Shelbak 

Crispy lettuce are seen during the harvesting process at an indoor vertical farm in South San Francisco, United States January 24, 2022. REUTERS/Carlos Barria 

A crispy lettuce leaf is seen during the harvesting process at an indoor vertical farm in South San Francisco, United States January 24, 2022. REUTERS/Carlos Barria 

Growing stacks are seen which will be used to cultivate varieties of lettuce in an 86,000 square-foot indoor vertical farm, one of the largest in the country, in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Each tank seen here can hold 10,000 gallons of water, which will recycle through a system used to grow lettuce in one of the largest indoor vertical farms in the country in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Pipes are seen that will recycle water used to grow lettuce in one of the largest indoor vertical farms in the country in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Pipes are seen that will recycle water used to grow lettuce in one of the largest indoor vertical farms in the country in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Growing stacks are seen which will be used to cultivate varieties of lettuce in an 86,000 square-foot indoor vertical farm, one of the largest in the country, in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Joey Tasher, General Manager for Kalera, stands among growing stacks that will be used to cultivate varieties of lettuce in an 86,000 square-foot indoor vertical farm, one of the largest in the country, in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Each tank seen here can hold 10,000 gallons of water, which will recycle through a system used to grow lettuce in one of the largest indoor vertical farms in the country in Aurora, Colorado, U.S., December 28, 2021. REUTERS/Kevin Mohatt 

Zoo staff feed lettuce to a manatee in an exhibition called 'Puerto Manati', which hosts two manatees in a conservation space with an underwater view, at the aquarium of the Guadalajara Zoo in Guadalajara, Mexico August 26, 2021. REUTERS/Fernando Carranza 

A manatee eats lettuce in an exhibition called 'Puerto Manati', which hosts two manatees in a conservation space with an underwater view, at the aquarium of the Guadalajara Zoo in Guadalajara, Mexico August 26, 2021. REUTERS/Fernando Carranza 

A manatee eats lettuce in an exhibition called 'Puerto Manati', which hosts two manatees in a conservation space with an underwater view, at the aquarium of the Guadalajara Zoo in Guadalajara, Mexico August 26, 2021. REUTERS/Fernando Carranza 

A manatee eats lettuce in an exhibition called 'Puerto Manati', which hosts two manatees in a conservation space with an underwater view, at the aquarium of the Guadalajara Zoo in Guadalajara, Mexico August 26, 2021. REUTERS/Fernando Carranza 

Zoo staff feed lettuce to a manatee in an exhibition called 'Puerto Manati', which hosts two manatees in a conservation space with an underwater view, at the aquarium of the Guadalajara Zoo in Guadalajara, Mexico August 26, 2021. REUTERS/Fernando Carranza 

A man hands over a lettuce to another man as prices are displayed at a weekly street market in Rio de Janeiro, Brazil July 8, 2021. REUTERS/Amanda Perobelli 

French snail grower and soap maker Damien Desrocher feeds a snail with a lettuce leaf before extracting slime that he used to make soap bars in his snail enclosure in Wahagnies, near Lille, France, May 11, 2021. Picture taken May 11, 2021. REUTERS/Ardee Napolitano 

Farmers work in a lettuce field in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

Farmers work in a lettuce field in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

Farmers work in a lettuce field in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

A field of lettuce in seen in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

A farmer holds lettuce as he stands in a lettuce field in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

Farmers work in a lettuce field in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

Hussein Madbouh, a farmer, walks in a lettuce field in Rayak, Bekaa Valley, Lebanon, May 10, 2021. Picture taken May 10, 2021. REUTERS/Mohamed Azakir 

Sea Spaghetti seaweed (Himanthalia elongata) rests on top of Sea Lettuce (Ulva) while the tide is out, before it is harvested by the O'Halloran's of Blath na Mara seaweed company, on a rocky shore on Inis Mor of the Aran Islands, Ireland, April 28, 2021. Scientists are combing Ireland's west coast for seaweed to feed to cattle and sheep after research showed it could stop them breathing out so much climate-warming methane. The project, coordinated by state agriculture body Teagasc, is tapping into the country's growing seaweed harvesting industry, which is seeking new markets as it revives centuries-old traditions. REUTERS/Clodagh Kilcoyne SEARCH "KILCOYNE SEAWEED" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

Umm Bashir al-Saour, 37-year-old widow, washes lettuce in Douma, in the eastern suburbs of Damascus, Syria March 9, 2021. Picture taken March 9, 2021. REUTERS/Omar Sanadiki 

Umm Bashir al-Saour, 37-year-old widow, cuts lettuce in Douma, in the eastern suburbs of Damascus, Syria March 9, 2021. Picture taken March 9, 2021. REUTERS/Omar Sanadiki 

Virginia Galan works on her lettuce garden in the backyard of her home amid concerns about the spread of the coronavirus disease (COVID-19) in Havana, Cuba, June 26, 2020. Picture taken June 26, 2020. REUTERS/Alexandre Meneghini 

A vegetable seller works on lettuce at a market amid the coronavirus disease (COVID-19) outbreak in Adjame a neighbourhood of Abidjan, Ivory Coast June 18, 2020. REUTERS/Thierry Gouegnon. 

A man in a mask walks by lettuce in new planter boxes, as tents are seen in the background, near a newly made community garden while protesters demonstrating against racial inequality occupy space at the CHOP area near the Seattle Police Department's East Precinct in Seattle, Washington, U.S. June 16, 2020. REUTERS/Lindsey Wasson 

Farmers carry containers with lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

A farmer carries a container with lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

Farmers carry containers with lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

A farmer harvests lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

Farmers load a truck with rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

Farmers load a truck with rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

A child carries a container with rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

A farmer piles rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez 

Livestock eat rotten lettuce at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez