A sheep grazes the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Gaspare De Martino, 40, poses for a photo as his sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Director of the Pompeii archaeological park Gabriel Zuchtriegel poses for a photo as sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

A sheep grazes the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 7, 2023. REUTERS/Guglielmo Mangiapane 

Sheep graze the grass as part of an initiative to protect ancient ruins from growing green in unexcavated areas of the archaeological site in Pompeii, Italy, March 6, 2023. REUTERS/Guglielmo Mangiapane 

Cows are seen in the field during a wildfire in Santa Juana, near Concepcion, Chile, February 20, 2023. REUTERS/Juan Gonzalez 

A group of guanacos graze in a mountain in the Andean province of Mendoza, Argentina February 9, 2023. REUTERS/Agustin Marcarian 

A cow grazes on ground during a wildfire in Santa Juana, near Concepcion, Chile, February 6, 2023. REUTERS/Juan Gonzalez 

A cow grazes on the high ground of a pasture flooded by winter storms in Sacramento county following multiple winter storms in Sacramento, California, U.S. January 9, 2023. REUTERS/Fred Greaves 

A herd of cows cross a flooded pasture in Sacramento county following multiple winter storms in Sacramento, California, U.S. January 9, 2023. REUTERS/Fred Greaves 

Deer graze and walk amongst the frozen undergrowth as the cold weather continues, in Richmond Park, London, Britain, December 17, 2022. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Deer graze and walk amongst the frozen undergrowth as the cold weather continues, in Richmond Park, London, Britain, December 17, 2022. REUTERS/Toby Melville 

Deer graze and walk amongst the frozen undergrowth as the cold weather continues, in Richmond Park, London, Britain, December 17, 2022. REUTERS/Toby Melville 

Deer graze and walk amongst the frozen undergrowth as the cold weather continues, in Richmond Park, London, Britain, December 17, 2022. REUTERS/Toby Melville 

Deer graze and walk amongst the frozen undergrowth as the cold weather continues, in Richmond Park, London, Britain, December 17, 2022. REUTERS/Toby Melville 

Deer graze and walk amongst the frozen undergrowth as the cold weather continues, in Richmond Park, London, Britain, December 17, 2022. REUTERS/Toby Melville 

A horse grazes in a steppe near the Ili River in the Almaty region, Kazakhstan, December 10, 2022. REUTERS/Pavel Mikheyev TPX IMAGES OF THE DAY 

Sheep search for grass amid freezing fog and snow on the Curragh gallops, in County Kildare, Ireland December 9, 2022. REUTERS/Clodagh Kilcoyne 

Sheep search for grass amid freezing fog and snow on the Curragh gallops, in County Kildare, Ireland December 9, 2022. REUTERS/Clodagh Kilcoyne 

Sheep search for grass amid freezing fog and snow on the Curragh gallops, in County Kildare, Ireland December 9, 2022. REUTERS/Clodagh Kilcoyne 

Sheep search for grass amid freezing fog and snow on the Curragh gallops, in County Kildare, Ireland December 9, 2022. REUTERS/Clodagh Kilcoyne 

Sheep search for grass amid freezing fog and snow on the Curragh gallops, in County Kildare, Ireland December 9, 2022. REUTERS/Clodagh Kilcoyne 

Farmer Ignacio Bastanchuri, 65, looks on as a horse grazes in a farmland affected by the drought caused by the climate phenomenon La Nina, at a farm in Navarro, in Buenos Aires province, Argentina December 5, 2022. REUTERS/Agustin Marcarian 

Sheep graze as fog develops over the South Downs National Park, near Petersfield, Britain, December 1, 2022. REUTERS/Toby Melville 

A herdsman looks after his cattle near a paddy field following a poor harvest following effects of the worsening drought due to failed rain seasons, in Mwea, Kenya November 30, 2022. REUTERS/Thomas Mukoya 

A young fighting bull stands in the pasture during a media tour of Fernando Guzman's fighting bull ranch in Cabanillas de la Sierra, outside Madrid, Spain, November 23, 2022. REUTERS/Susana Vera 

A sheep cleans her newborn lamb minutes after it was born near Ruchama, in southern Israel's Negev desert November 22, 2022. REUTERS/Amir Cohen 

Horses graze next to the the Moais at Ahu Tongariki archaeological site in Rapa Nui, Easter Island, Chile November 15, 2022. REUTERS/Pablo Sanhueza 

A woman grazes animals close to Al-Bu Hussain village which sits on the bank of a former canal which has dried up, in Diwaniya, Iraq, November 8, 2022. "Climate change is a reality in Iraq," said the United Nations mission in Iraq, adding that the country was the world's fifth most vulnerable to the fallout from global warming due to rising temperatures, lower rainfall, salinity, and dust storms. "Desertification now threatens almost 40 percent of the area of our country - a country that was once one of the most fertile and productive in the region," Iraq's President Abdul Latif Rashid told the climate summit in Egypt last week. REUTERS/Alaa Al-Marjani SEARCH "CLIMATE MIDEAST WATER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Cows affected by the worsening drought due to failed rain seasons, gather at a water point within in the Mgeno conservancy in Mwatate Sub-County, Taita Taveta County, Kenya November 8, 2022. REUTERS/Thomas Mukoya 

A cow grazes near a damaged house, amid Russia's attack on Ukraine, in the village of Arkhanhelske, Kherson region, Ukraine November 8, 2022. REUTERS/Viacheslav Ratynskyi 

A woman looks at sheep grazing in a huge pit created by farmers who took soil to build new terraces for cultivating qat, on the outskirts of Sanaa, Yemen, November 2, 2022. REUTERS/Khaled Abdullah 

Cows which escaped farms and became wild after beginning of Russia's attack on Ukraine, are seen near a frontline in Mykolaiv region, Ukraine October 25, 2022. REUTERS/Valentyn Ogirenko 

A shepherd walks next to a flock as people watch the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A sheep runs past people watching the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A flock of sheep are herded past the Santa Cruz Palace during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A flock of sheep are herded past the Santa Cruz Palace during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A woman poses for a photograph next to a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

Shepherds walk next to a flock as people watch the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A sheep runs past people watching the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, at Plaza Mayor in Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A shepherd looks on as people watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A boy puts his hand out near a sheep in a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A man holds the mouth of a sheep in a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, on the streets of Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People take photographs as they watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, near Cibeles Palace in Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

A woman takes a photograph as people watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, near Cibeles Palace in Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura 

People take photographs as they watch a flock during the annual sheep parade, during which shepherds exercise their right to use traditional migration routes for their livestock from northern Spain to winter grazing pasture land in the southern areas of the country, near Cibeles Palace in Madrid, Spain, October 23, 2022. REUTERS/Violeta Santos Moura