A man sprays newly-developed bio-decomposer solution in a field to prevent stubble burning, in New Delhi, India, October 13, 2020. REUTERS/Anushree Fadnavis

A man sprays newly-developed bio-decomposer solution in a field to prevent stubble burning, in New Delhi, India, October 13, 2020. REUTERS/Anushree Fadnavis

A farmer burns wheat waste stubble in a field on Earth Day, as the spread of the coronavirus disease (COVID-19) continues, on the outskirts of Ahmedabad, India, April 22, 2020. REUTERS/Amit Dave

Participants dressed as "Wild Men" attend the traditional Schleicherlaufen run during Shrovetide (Fasnacht) in Telfs, Austria February 2, 2020. REUTERS/Leonhard Foeger

Sweden's King Carl XVI Gustaf checks a thread made out of cotton and rice stubble at an IKEA stall before attending a programme on tackling emissions and air pollution in New Delhi, India, December 3, 2019. REUTERS/Anushree Fadnavis

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India, November 6, 2019. REUTERS/Amit Dave

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India, November 6, 2019. REUTERS/Amit Dave

A supporter of Aam Aadmi Party (AAP) tries to put a mask on a dog at a protest against crop stubble burning in northern states of Haryana and Punjab, in New Delhi, India, October 31, 2019. REUTERS/Anushree Fadnavis

Avala tower is seen as fields have been set ablaze as farmers torched weed and stubble near Belgrade, Serbia, October 23, 2019. Picture taken October 23, 2019. REUTERS/Marko Djurica

A truck drives by fields that have been set ablaze as farmers torched weed and stubble near Pancevo, Serbia, October 23, 2019. Picture taken October 23, 2019. REUTERS/Marko Djurica

Smoke billows from paddy waste stubble as it burns in a field in Karnal district of the northern state of Haryana, India, September 30, 2019. Picture taken September 30, 2019. REUTERS/Mayank Bhardwaj

A man burns paddy waste stubble in a field in Karnal district of the northern state of Haryana, India, September 30, 2019. Picture taken September 30, 2019. REUTERS/Mayank Bhardwaj

People wearing masks march through the streets during Easter celebrations in Ceske Budejovice, Czech Republic, April 19, 2019. REUTERS/David W Cerny

Smoke from burning stubble rises in the fields of Boucan Ferdinand, Haiti, April 4, 2018. Picture taken April 4, 2018. REUTERS/Andres Martinez Casares

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 30, 2018. REUTERS/Amit Dave

Christmas decoration items are displayed for sale at a shop in Hanoi, Vietnam, November 29, 2018. REUTERS/Kham

Christmas decoration items are displayed for sale at a shop in Hanoi, Vietnam, November 29, 2018. REUTERS/Kham

A boy rides a bullock cart as smoke billows from paddy waste stubble as it burns in a field near Jewar, in the northern state of Uttar Pradesh, India November 6, 2018. REUTERS/Altaf Hussain

Smoke billows from paddy waste stubble as it burns in a field near Jewar, in the northern state of Uttar Pradesh, India November 6, 2018. REUTERS/Altaf Hussain

Farmers burn the stubble in a rice field on the outskirts of Amritsar, India, November 2, 2018. REUTERS/Munish Sharma

Map showing stubble fires and aerosol optical thickness in north India

Women collect stubble from a rice field in Gharaunda in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

Stubble is seen burning at a rice field in Gharaunda in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

Stubble is seen at a rice field in Gharaunda in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

Women collect stubble from a rice field in Gharaunda in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

A farmer burns the stubble in a rice field in Zirakpur in the northern state of Punjab, India, October 10, 2018. Picture taken October 10, 2018. REUTERS/Adnan Abidi

A farmer burns the stubble in a rice field in Karnal in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

Residential buildings are visible behind the stubble burning smoke at a rice field in Zirakpur in the northern state of Punjab, India, October 10, 2018. Picture taken October 10, 2018. REUTERS/Adnan Abidi

A farmer burns the stubble in a rice field in Karnal in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

A farmer burns the stubble in a rice field in Karnal in the northern state of Haryana, India, October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

A farmer burns the stubble in a rice field in Karnal in the northern state of Haryana, India October 9, 2018. Picture taken October 9, 2018. REUTERS/Adnan Abidi

A farmer burns paddy waste stubble in a field at Mayong village in Morigaon district in the northeastern state of Assam, India, June 5, 2018. REUTERS/Anuwar Hazarika

Participants gather for the annual May bank holiday "Jack In The Green" parade and festival in Hastings, Britain, May 7, 2018. REUTERS/Toby Melville

A metal sculpture is seen on the premises of the Frere Hall, built in the British colonial period, in Karachi, Pakistan, January 30, 2018. REUTERS/Akhtar Soomro SEARCH "SOOMRO ARCHITECTURE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A man poses as more than a hundred cyclists dressed as Santa Claus meet at the Colosseum in Rome, Italy December 17, 2017. REUTERS/Tony Gentile

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 15, 2017. REUTERS/Amit Dave TPX IMAGES OF THE DAY

Farmers burn paddy waste stubble in a field on the outskirts of Ahmedabad, India November 15, 2017. REUTERS/Amit Dave

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 15, 2017. REUTERS/Amit Dave

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 15, 2017. REUTERS/Amit Dave

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 15, 2017. REUTERS/Amit Dave

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 10, 2017.REUTERS/Amit Dave

A farmer burns paddy waste stubble in a field on the outskirts of Ahmedabad, India November 10, 2017.REUTERS/Amit Dave

Farmers attend a protest demanding compensation after the government bans the stubble burning in Chandigarh, India, September 28, 2017. REUTERS/Ajay Verma

A competitor arrives in fancy dress before taking part in the New Year's Day swim at Saundersfoot in Wales, Britain, January 1, 2017. REUTERS/Rebecca Naden

Television personality Ryan Seacrest (C) wears a mask as he and U.S. first lady Michelle Obama (R) read 'The Night Before Christmas' during their visit at Children's National Medical Center in Washington, DC, U.S. December 12, 2016. REUTERS/Jonathan Ernst

A man paddles his cycle amidst smoke billowing from burning paddy waste stubble in a field on the outskirts of Amritsar, India November 8, 2016. REUTERS/Munish Sharma

A man burns paddy waste stubble in a field on the outskirts of Chandigarh, India November 8, 2016. REUTERS/Ajay Verma

Smoke billows from paddy waste stubble as it burns in a field on the outskirts of Chandigarh, India November 8, 2016. REUTERS/Ajay Verma

An internally displaced man has his beard trimmed near Hassan Sham, east of Mosul, Iraq October 25, 2016. REUTERS/Goran Tomasevic

An internally displaced man cuts his beard near Hassan Sham, east of Mosul, Iraq October 25, 2016. REUTERS/Goran Tomasevic

An artisan makes the finishing touches to an idol of Lord Vishwakarma, the Hindu deity of architecture and machinery, inside a workshop ahead of the Vishwakarma festival in Chandigarh, India September 16, 2016. REUTERS/Ajay Verma TPX IMAGES OF THE DAY

A supporter of Republican presidential nominee Donald Trump dances before a campaign rally in Everett, Washington, U.S., August 30, 2016. REUTERS/Carlo Allegri

A bearded pig is hosed down with water at London Zoo in London, Britain August 16, 2016. REUTERS/Neil Hall

A bearded pig is hosed down with water at London Zoo in London, Britain August 16, 2016. REUTERS/Neil Hall

A bearded pig is hosed down with water at London Zoo in London, Britain August 16, 2016. REUTERS/Neil Hall

A bearded pig is hosed down with water at London Zoo in London, Britain August 16, 2016. REUTERS/Neil Hall

A bearded pig is hosed down with water at London Zoo in London, Britain August 16, 2016. REUTERS/Neil Hall

A Sadhu or Hindu holy man combs his beard after taking a dip in the waters of Shipra river during Simhastha Kumbh Mela in Ujjain, India May 16, 2016. REUTERS/Jitendra Prakash TPX IMAGES OF THE DAY

Football Soccer - Wales v Northern Ireland - International Friendly - Cardiff City Stadium - 24/3/16
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Two volunteers from the social work community "Friends of the World" help to shave a homeless man's beard in San Jose, Costa Rica February 24, 2016. More than 30 young volunteers walk around the city, offering food, clothes, haircuts, shaves and checkups to the homeless they encountered along the way, according to local media. REUTERS/Juan Carlos Ulate TPX IMAGES OF THE DAY