Cows stand among manure on the ground at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Cows stand among manure on the ground at a dairy farm in Oldetrijne, in the Dutch province of Friesland, Netherlands March 15, 2023. Dutch farmers are worried about plans by the government to limit the amount of nitrogen in the soil and water blamed on overuse of fertilizers. If nitrogen pollution rules are enforced, many livestock farms will have to get rid of animals or close. REUTERS/Piroschka van de Wouw 

Members of the White Rebels gesture towards cow manure that has been dumped outside the White House on Earth Day by the Extinction Rebellion in protest against President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Members of the White Rebels gesture towards cow manure that has been dumped outside the White House on Earth Day by the Extinction Rebellion in protest against President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Members of the White Rebels gesture in front of cow manure that has been dumped outside the White House on Earth Day by the Extinction Rebellion in protest against President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

The White Rebels and Extinction Rebellion DC block 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

The White Rebels and Extinction Rebellion DC block 17th Street after dumping cow manure outside the White House on Earth Day to protest U.S. President Joe Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein TPX IMAGES OF THE DAY 

The White Rebels and Extinction Rebellion DC protest outside the White House on Earth Day against President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC brings pink wheel barrows full of cow manure to dump outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC carries pink wheel barrows full of cow manure to dump outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC holds a protest after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC blocks 17th Street after dumping cow manure outside the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC dumps cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden?s climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

Extinction Rebellion DC marches with pink wheelbarrows to dump heaps of cow manure at the entrance to the White House on Earth Day to protest President Biden's climate plan in Washington, U.S., April 22, 2021. REUTERS/Evelyn Hockstein 

A tractor pulling a manure spreader is seen on Derrydale Farm, an organic dairy farm in Belle Plaine, Minnesota, U.S., October 24, 2020. Picture taken October 24, 2020. REUTERS/Bing Guan 

Paprika farmer Peter Szabo spreads organic manure on a red pepper field in Batya, Hungary, July 9, 2020. Picture taken July 9, 2020. REUTERS/Bernadett Szabo 

Paprika farmer Peter Szabo spreads organic manure on a pepper field in Batya, Hungary, July 9, 2020. Picture taken July 9, 2020. REUTERS/Bernadett Szabo 

A detailed view of camel feces at the animal waste transfer station in Adhen Village, Ras al Khaimah, United Arab Emirates July 16, 2019. Picture taken July 16, 2019. REUTERS/Christopher Pike 

A camel defecates at a farm in Adhen Village, Ras al Khaimah, United Arab Emirates July 16, 2019. Picture taken July 16, 2019. REUTERS/Christopher Pike 

Gordon A. Giese and his son Paul Giese get ready to fill a manure tank at the family farm, God Green Acres in Mayville, Wisconsin, U.S., June 24, 2019. Picture taken June 24, 2019. REUTERS/Darren Hauck 

Gordon A. Giese and his son Paul Giese get ready to fill a manure tank at the family farm, God Green Acres in Mayville, Wisconsin, U.S., June 24, 2019. Picture taken June 24, 2019. REUTERS/Darren Hauck 

Gordon A. Giese and his son Paul Giese get ready to fill a manure tank at the family farm, God Green Acres in Mayville, Wisconsin, U.S., June 24, 2019. Picture taken June 24, 2019. REUTERS/Darren Hauck 

Gordon A. Giese, 66, gets ready to spread manure at the family farm, God Green Acres in Mayville, Wisconsin, U.S., June 24, 2019. Picture taken June 24, 2019. REUTERS/Darren Hauck 

People march as they attend the anti-AfD protest during Alternative for Germany (AfD) two-day party congress in Augsburg, Germany, June 30, 2018. The placard reads "Manure!". REUTERS/Wolfgang Rattay 

Laurence, companion of French farmer Jean-Bernard Huon, unloads manure on land near their farm in Riec-sur-Belon, France, October 25, 2017. REUTERS/Stephane Mahe SEARCH "MAHE FARMER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A girl shovels manure from cattle, some seized by cow vigilantes, in a gaushala, Barsana, India, June 13, 2017. Picture taken June 13, 2017. To match Special Report INDIA-POLITICS/RELIGION-COWS REUTERS/Cathal McNaughton 

Soccer Football - Champions League - Manchester City vs Shakhtar Donetsk - Etihad Stadium, Manchester, Britain - September 26, 2017 General view of horse manure outside the stadium before the match Action Images via Reuters/Lee Smith 

A girl clears cow manure at a Gaushala or cow sanctuary in Barsana, India, June13, 2017. REUTERS/Cathal McNaughton 

Cow manure is seen as cows wait to be milked in a milk farm on the outskirts of Libertad city, Uruguay, June 8, 2017. REUTERS/Andres Stapff 

A woman puts feces in a bucket to prepare "Poopootovs", which is a play on Molotov cocktails, before they are thrown at security forces during protests, in addition to the usual rocks and petrol bombs, in Caracas, Venezuela May 9, 2017. REUTERS/Christian Veron TPX IMAGES OF THE DAY 

Smokejumper recruit Ross Lindell untangles his parachute after landing in cow manure during his first training jump from an airplane into a field adjacent to the North Cascades Smokejumper Base in Winthrop, Washington, U.S., June 7, 2016. REUTERS/David Ryder SEARCH "SMOKEJUMPING" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES.

A farmer attends his field, pumping manure for rice seedlings in Qalyub, in the El-Kalubia governorate, northeast of Cairo, Egypt June 1, 2016. Picture taken June 1, 2016. To match Interview EGYPT-WHEAT/ REUTERS/Amr Abdallah Dalsh 

A farmer attends his field, pumping manure for rice seedlings in Qalyub, in the El-Kalubia governorate, northeast of Cairo, Egypt June 1, 2016. Picture taken June 1, 2016. To match Interview EGYPT-WHEAT/ REUTERS/Amr Abdallah Dalsh 

Farming liquid manure vehicles are pictured in Wolfen, Germany, February 29, 2016. REUTERS/Fabrizio Bensch 

A cow is silhouetted in front of manure at the farm owned by French farmer Franck Pellerin (not pictured) in La Chapelle-Caro, central Brittany, France, September 2, 2015. REUTERS/Stephane Mahe 

Mohammad Zayed carries a bucket of waste to be used in a HomeBioGas portable reactor that turns food leftovers and manure into methane outside his home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad 

Mohammad Zayed fills a bucket with waste to be used in a HomeBioGas portable reactor that turns food leftovers and manure into methane outside his home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad

Nayef Zayed and his son Mohammad prepare to pour waste into a HomeBioGas portable reactor that turns food leftovers and manure into methane outside their home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad

Nayef Zayed empties a bucket of waste into a HomeBioGas portable reactor that turns food leftovers and manure into methane outside his home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad

Mohammad Zayed carries a bucket of waste to be used in a HomeBioGas portable reactor that turns food leftovers and manure into methane outside his home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad

Nayef Zayed empties a bucket of waste into a HomeBioGas portable reactor that turns food leftovers and manure into methane outside his home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad 

Sons of Nayef Zayed stand next to a Home Biogas portable reactor that turns food leftovers and manure to make methane, outside their home in the Palestinian Bedouin village of Ojah, near the West Bank city of Jericho August 17, 2015. Palestinian villagers living in desolate, off-grid areas in the West Bank have begun using Israeli-made biogas generators that supply free, clean energy by gobbling up organic waste. Picture taken August 17, 2015. REUTERS/Ammar Awad

Riot police file past a pile of manure at a farm during a demonstration in Garmisch-Partenkirchen, southern GermanyJune 7, 2015. Leaders from the Group of Seven (G7) industrial nations meet on Sunday in the Bavarian Alps for a summit overshadowed by Greece's debt crisis and ongoing violence in Ukraine. REUTERS/Hannibal Hanschke TPX IMAGES OF THE DAY

A girl stands beside the gate of her family home with cow dung cakes on wall, on the outskirts of Peshawar January 22, 2015. REUTERS Fayaz Aziz (PAKISTAN - Tags: SOCIETY) 

A woman pastes cow dung cakes on a wall for drying in the northern Indian city of Allahabad April, 16, 2014. REUTERS/Jitendra Prakash (INDIA - Tags: SOCIETY TPX IMAGES OF THE DAY) FOR BEST QUALITY IMAGE ALSO SEE: GM1EAB40N8U01 

Sadhus, or Hindu holy men, perform prayers while sitting inside circles of burning "Upale" (or dried cow dung cakes) on the banks of the river Ganges during the Magh Mela festival in the northern Indian city of Allahabad February 4, 2014. REUTERS/Jitendra Prakash (INDIA - Tags: RELIGION SOCIETY TPX IMAGES OF THE DAY) 

Butterflies congregate on dog faeces set by butterfly hunters in Bangui, Central African Republic, December 1, 2013. Mosaics made out of butterfly wings are a popular art form in Central African Republic. Professional butterfly hunters gather butterflies in the forest outside Bangui, then sell them to artists, who use the wings to make mosaics. The hunters use palm wine, urine and dog feces as traps to attract the butterflies. Picture taken December 1, 2013. REUTERS/Joe Penney (CENTRAL AFRICAN REPUBLIC - Tags: ANIMALS SOCIETY ENVIRONMENT BUSINESS) 

A woman collecting camel dung to be used as cooking fuel looks on past a herd of camels at Pushkar Fair in the desert Indian state of Rajasthan November 9, 2013. Many international and domestic tourists throng to Pushkar to witness one of the most colourful and popular fairs in India. Thousands of animals, mainly camels, are brought to the fair to be sold and traded. REUTERS/Ahmad Masood (INDIA - Tags: SOCIETY ANIMALS TRAVEL)