Volunteers carry saplings to plant at a place wich used to be a landfill, with the aim of diverting it into a garden, in Zakho, district of Dohuk, Iraq January 22, 2020. Picture taken January 22, 2020. REUTERS/Ari Jalal

Hydrologist Gideon Groenewald holds a forked sapling as he demonstrates one of the methods he uses to find underground water sources near drought-stricken Graaff-Reinet, South Africa, November 15, 2019. Picture taken November 15 2019. REUTERS/Mike Hutchings

Extinction rebellion protesters hold tree saplings outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

MP Kate Green holds a tree sapling as she listens to an Extinction rebellion protester outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

Extinction rebellion protesters hold tree saplings outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

An Extinction rebellion protester places tree saplings outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

An Extinction rebellion protester poses among tree saplings outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

An Extinction rebellion protester carries tree saplings outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

An Extinction rebellion protester places tree saplings outside the Houses of Parliament in London, Britain, October 8, 2019. REUTERS/Henry Nicholls

Activist and treegrower Siyabulela Sokomani celebrates as he approaches the final stretch of the Cape Town marathon, in South Africa September 15, 2019. He is one of a group of 20 runners participating in the marathon with saplings on their backs to promote the planting of native trees amid a nationwide push to replace invasive species with indigenous ones to cope with drought and climate change. REUTERS/Mike Hutchings

Activist and treegrower Siyabulela Sokomani celebrates as he approaches the final stretch of the Cape Town marathon, in South Africa September 15, 2019. He is one of a group of 20 runners participating in the marathon with saplings on their backs to promote the planting of native trees amid a nationwide push to replace invasive species with indigenous ones to cope with drought and climate change. REUTERS/Mike Hutchings

Activist and treegrower Siyabulela Sokomani prepares for the start of the Cape Town marathon, in South Africa September 15, 2019. He is one of a group of 20 runners participating in the marathon with saplings on their backs to promote the planting of native trees amid a nationwide push to replace invasive species with indigenous ones to cope with drought and climate change. REUTERS/Mike Hutchings

Activist and treegrower Siyabulela Sokomani takes a selfies as he prepares for the start of the Cape Town marathon, in South Africa September 15, 2019. He is one of a group of 20 runners participating in the marathon with saplings on their backs to promote the planting of native trees amid a nationwide push to replace invasive species with indigenous ones to cope with drought and climate change. REUTERS/Mike Hutchings

Activist and treegrower Siyabulela Sokomani celebrates as he approaches the final stretch of the Cape Town marathon, in South Africa September 15, 2019. He is one of a group of 20 runners participating in the marathon with saplings on their backs to promote the planting of native trees amid a nationwide push to replace invasive species with indigenous ones to cope with drought and climate change. REUTERS/Mike Hutchings

Part of a group of 20 runners approach the final stretch of the Cape Town marathon with saplings on their backs to promote the planting of native trees amid a nationwide push to replace invasive species with indigenous ones to cope with drought and climate change in Cape Town, South Africa September 15, 2019. REUTERS/Mike Hutchings

A farmer plants saplings in a rice field on the outskirts of Lahore, Pakistan July 16, 2019. REUTERS/Mohsin Raza

A farmer carries bundles of saplings to plant them in a rice field on the outskirts of Lahore, Pakistan July 16, 2019. REUTERS/Mohsin Raza

Farmers plant saplings in a rice field on the outskirts of Lahore, Pakistan July 16, 2019. REUTERS/Mohsin Raza

Farmers plant saplings in a rice field on the outskirts of Ahmedabad, India, July 5, 2019. REUTERS/Amit Dave

A farmer carries saplings to plant in a rice field on the outskirts of Ahmedabad, India, July 5, 2019. REUTERS/Amit Dave

A farmer carries saplings to plant in a rice field on the outskirts of Ahmedabad, India, July 5, 2019. REUTERS/Amit Dave

A farmer walk past rice saplings planted between the plowed field as they wait for the monsoon rain to arrives to harvest rice in Lalitpur, Nepal June 26, 2019. REUTERS/Navesh Chitrakar

Palestinian woman Vivien Sansour, who collects the seeds of Palestinian crops and shares them with farmers across the West Bank and with Palestinians in the diaspora, looks on as she plants tomato saplings with other farmers in the village of Nisf Jubeil, in the Israeli-occupied West Bank May 1, 2019. Picture taken May 1, 2019. REUTERS/Abed Omar Qusini

A Palestinian farmer plants tomato saplings in the village of Nisf Jubeil, in the Israeli-occupied West Bank May 1, 2019. Picture taken May 1, 2019. REUTERS/Abed Omar Qusini

Women plant rice saplings at a paddy field in a village in Nagaon district, in the northeastern state of Assam, India, July 3, 2018. Picture taken July 3, 2018. REUTERS/Anuwar Hazarika

A farmer gathers saplings to be planted at a paddy field in a village in Nagaon district, in the northeastern state of Assam, India, July 3, 2018. Picture taken July 3, 2018. REUTERS/Anuwar Hazarika

Women sing and dance as they plant rice saplings during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

Participants play in the mud as they plant rice saplings during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

A woman collects rice saplings before planting them during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

Women holding rice saplings walks along the field during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

A woman plows a field before planting rice saplings during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

A farmer plows a field before planting rice saplings during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

Rice saplings are pictured on a field during National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Lalitpur, Nepal, June 29, 2018. REUTERS/Navesh Chitrakar

Farmers plant rice saplings in a paddy field a day ahead of National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Bhaktapur, Nepal, June 28, 2018. REUTERS/Navesh Chitrakar

A woman ties a shawl on her head while she plants rice saplings in a paddy field a day ahead of National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Bhaktapur, Nepal, June 28, 2018. REUTERS/Navesh Chitrakar

Farmers plant rice saplings in a paddy field a day ahead of National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Bhaktapur, Nepal, June 28, 2018. REUTERS/Navesh Chitrakar

A woman plants rice saplings in a paddy field a day ahead of National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Bhaktapur, Nepal, June 28, 2018. REUTERS/Navesh Chitrakar

A woman plants rice saplings in a paddy field a day ahead of National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Bhaktapur, Nepal, June 28, 2018. REUTERS/Navesh Chitrakar

A woman holds rice saplings as she plants them in a paddy field a day ahead of National Paddy Day, also called Asar Pandra, that marks the commencement of rice crop planting in paddy fields as monsoon season arrives, in Bhaktapur, Nepal, June 28, 2018. REUTERS/Navesh Chitrakar

Farmers plant saplings in a rice field in Srinagar June 5, 2018. REUTERS/Danish Ismail

Saplings of carrots are shown at VeggieWorld fair in Lisbon, Portugal April 29, 2018. REUTERS/Rafael Marchante

U.S. President Donald Trump and first lady Melania Trump plant an oak tree sapling with French President Emmanuel Macron and his wife Brigitte on the South Lawn of the White House in Washington, U.S., April 23, 2018. REUTERS/Joshua Roberts

U.S. President Donald Trump and first lady Melania Trump plant an oak tree sapling with French President Emmanuel Macron and his wife Brigitte on the South Lawn of the White House in Washington, U.S., April 23, 2018. REUTERS/Joshua Roberts

Farmers plant rice saplings on paddy fields in Sindhuli district, Nepal August 15, 2017. REUTERS/Navesh Chitrakar

Labourers pull a plastic sheet loaded with saplings to plant them in a rice field on the outskirts of Ahmedabad, India, July 5, 2017. REUTERS/Amit Dave

A farmer plants rice saplings in the field during the National Paddy Day, also called Asar Pandra festival, that marks the commencement of rice crop planting in paddy fields, in Bhaktapur, Nepal June 29, 2017. REUTERS/Navesh Chitrakar

A farmer holding rice saplings walks along the field during the National Paddy Day, also called Asar Pandra festival, that marks the commencement of rice crop planting in paddy fields, in Bhaktapur, Nepal June 29, 2017. REUTERS/Navesh Chitrakar

Rice saplings are pictured on the field during the National Paddy Day, also called Asar Pandra festival, that marks the commencement of rice crop planting in paddy fields, in Bhaktapur, Nepal June 29, 2017. REUTERS/Navesh Chitrakar

A farmer plants rice saplings in the field during the National Paddy Day, also called Asar Pandra festival, that marks the commencement of rice crop planting in paddy fields, in Bhaktapur, Nepal June 29, 2017. REUTERS/Navesh Chitrakar

A farmer plows a field before planting rice saplings during the National Paddy Day, also called Asar Pandra festival, that marks the commencement of rice crop planting in paddy fields, in Bhaktapur, Nepal June 29, 2017. REUTERS/Navesh Chitrakar

A farmer plows a field before planting rice saplings during the National Paddy day, also called Asar Pandra festival, that marks the commencement of rice crop planting in paddy fields, in Bhaktapur, Nepal June 29, 2017. REUTERS/Navesh Chitrakar

FILE PHOTO: A farmer plants saplings in a rice field in Satsumasendai, Kagoshima prefecture, Japan, July 8, 2015. REUTERS/Issei Kato/File Photo

Farmers plant saplings in a paddy field on the outskirts of Ahmedabad, India, February 1, 2017. REUTERS/Amit Dave

Farmers carry saplings in a paddy field on the outskirts of Ahmedabad, India, February 1, 2017. REUTERS/Amit Dave

Farmers plant saplings in a paddy field in Allahabad, India, July 8, 2016. REUTERS/Jitendra Prakash

Rice saplings are pictured on the field during the Asar Pandra festival in Lalitpur, Nepal, June 29, 2016. Farmers in Nepal celebrate the festival to mark the commencement of rice crop planting in paddy fields. REUTERS/Navesh Chitrakar

A farmer plants saplings in a paddy field on the outskirts of Agartala, India, June 27, 2016. REUTERS/Jayanta Dey

Labourers plant saplings in a paddy field on the outskirts of the eastern Indian city of Bhubaneswar in this July 19, 2014 file photo. REUTERS/Stringer

A laborer ties a bundle of rice saplings as others plant them in another field in Karjat, India, March 1, 2016. India unveiled a fire-fighting budget on Monday that seeks to win back support among rural voters for Prime Minister Narendra Modi's government and sustain growth against a grim global backdrop - all without borrowing more. REUTERS/Danish Siddiqui

Laborers collect rice saplings as others plant them in another field in Karjat, India, March 1, 2016. India unveiled a fire-fighting budget on Monday that seeks to win back support among rural voters for Prime Minister Narendra Modi's government and sustain growth against a grim global backdrop - all without borrowing more. REUTERS/Danish Siddiqui