A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

BASF Schwarzheide GmbH info board is seen in front of the factory in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

A general view of the German chemical company, BASF Schwarzheide GmbH in Schwarzheide, Germany, December 10, 2019. REUTERS/Annegret Hilse

The chemical company BASF building in Levallois-Perret, near Paris, France, is seen at sunset, November 29, 2018. REUTERS/Christian Hartmann

The chemical company BASF building in Levallois-Perret, near Paris, France, is seen at sunset, November 29, 2018. REUTERS/Christian Hartmann

Martin Brudermueller, Chairman of the Board of Executive Directors and Chief Technology Officer (CTO), BASF SE attends German-Chinese Forum for economic cooperation in Berlin, Germany, July 9, 2018. REUTERS/Fabrizio Bensch

Martin Brudermueller, Chairman of the Board of Executive Directors and Chief Technology Officer (CTO), BASF SE attends German-Chinese Forum for economic cooperation in Berlin, Germany, July 9, 2018. REUTERS/Fabrizio Bensch

Martin Brudermueller, Chairman of the Board of Executive Directors and Chief Technology Officer (CTO), BASF SE attends German-Chinese Forum for economic cooperation in Berlin, Germany, July 9, 2018. REUTERS/Fabrizio Bensch

Martin Brudermueller, Chairman of the Board of Executive Directors and Chief Technology Officer (CTO), BASF SE attends German-Chinese Forum for economic cooperation in Berlin, Germany, July 9, 2018. REUTERS/Fabrizio Bensch

Chairman of Board of Executive Directors of German chemical company BASF Kurt Bock attends a meeting with Russian President Vladimir Putin (not pictured) at the Kremlin in Moscow, Russia, March 22, 2017. REUTERS/Natalia Kolesnikova/Pool

Russian President Vladimir Putin (L) shakes hands with Chairman of Board of Executive Directors of German chemical company BASF Kurt Bock during a meeting at the Kremlin in Moscow, Russia, March 22, 2017. REUTERS/Natalia Kolesnikova/Pool

Russian President Vladimir Putin (L) shakes hands with Chairman of Board of Executive Directors of German chemical company BASF Kurt Bock during a meeting at the Kremlin in Moscow, Russia, March 22, 2017. REUTERS/Natalia Kolesnikova/Pool

Russian President Vladimir Putin (L) meets with Chairman of Board of Executive Directors of German chemical company BASF Kurt Bock at the Kremlin in Moscow, Russia, March 22, 2017. REUTERS/Natalia Kolesnikova/Pool

Illustrations présentant le fonctionnement d’une batterie lithium-ion utilisée dans les voitures électriques et hybrides selon les données de Toyota et BASF

Flags of the German chemical company BASF are pictured in Monheim, Germany April 20, 2012. REUTERS/Ina Fassbender/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH 'BUSINESS WEEK AHEAD 24 OCT' FOR ALL IMAGES

Smoke rises from the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Kai Pfaffenbach

Fire engines secure the perimeter at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Kai Pfaffenbach

Firefighters try to extinguish fire at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Kai Pfaffenbach

Firefighters try to extinguish fire at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Kai Pfaffenbach

Fire and smoke rise from the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Fire and smoke rise from the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Police block a street after an explosion at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Firefighters try to extinguish fire at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Firefighters try to extinguish fire at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Smoke rises from the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Firefighters try to extinguish fire at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Firefighters try to extinguish fire at the factory of chemicals giant BASF in Ludwigshafen, Germany where several people had been injured following an explosion, October 17, 2016. REUTERS/Ralph Orlowski

Flags of the German chemical company BASF are pictured in Monheim, Germany April 20, 2012. REUTERS/Ina Fassbender/File Photo

A logo is seen on the facade of the BASF plant and former Ciba production site in Schweizerhalle near Basel, Switzerland July 7, 2009. REUTERS/Christian Hartmann/File Photo

A cyclist rides his bike past the entrance of the BASF plant and former Ciba production site in Schweizerhalle near Basel, Switzerland July 7, 2009. REUTERS/Christian Hartmann/File Photo

A cyclist rides his bike past the entrance of the BASF plant and former Ciba production site in Schweizerhalle near Basel July 7, 2009. REUTERS/Christian Hartmann/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH "BUSINESS WEEK AHEAD JULY 25" FOR ALL IMAGES

A cyclist rides his bike past the entrance of the BASF plant and former Ciba production site in Schweizerhalle near Basel July 7, 2009. REUTERS/Christian Hartmann/File Photo

A cyclist rides his bike past the entrance of the BASF plant and former Ciba production site in Schweizerhalle near Basel July 7, 2009. REUTERS/Christian Hartmann/File Photo

A logo is seen on the facade of the BASF plant and former Ciba production site in Schweizerhalle near Basel July 7, 2009. REUTERS/Christian Hartmann/File Photo

A truck driver walks along a BASF sign on the road near the warehouse of German chemical company BASF in Ludwigshafen, April 23, 2015. REUTERS/Ralph Orlowski/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH 'BUSINESS WEEK AHEAD APRIL 25' FOR ALL IMAGES

German Chancellor Angela Merkel leaves after she toured an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel (C) speaks with employees after she toured an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel (C) and the State Premier of the federal state of Saxony-Anhalt, Reiner Haseloff (L) speak with employee Antje Mroczek (R) as they tour an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel and the State Premier of the federal state of Saxony-Anhalt, Reiner Haseloff (L), tour an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel (C) and the State Premier of the federal state of Saxony-Anhalt, Reiner Haseloff (L), tour an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel reacts as she tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel smiles as she tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel reacts as she tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel smiles as she tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

German Chancellor Angela Merkel smiles as she tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool TPX IMAGES OF THE DAY

German Chancellor Angela Merkel smiles as she tours an analytical laboratory at the chemical park in Leuna, Germany, March 3, 2016. Leuna, the biggest site for chemicals in Germany, hosts international corporations such as ARKEMA, BASF, DOMO, Eastman, Innospec, Linde and TOTAL. REUTERS/Jens Schlueter/Pool

An employee uses a scooter to ride in a greenhouse of the Plant Advanced Technologies (PAT) company in Laronxe near Nancy, Eastern France, June 19, 2015. The farmers employed at the site in Laronxe are growing plants in a special way with a view to "milking" them for use in medicines, cosmetics and agrochemicals. Several major brands, including Germany's BASF and France's Chanel, have teamed up with Plant Advanced Technologies (PAT) in the hope of securing privileged access to the so-called 'biomolecules' it extracts through the use of a patented technique. Picture taken June 19, 2015. REUTERS/Vincent Kessler

An employee prepares the exudation of plants roots at the Plant Advanced Technologies (PAT) company greenhouse in Laronxe near Nancy, Eastern France, June 19, 2015. The farmers employed at the site in Laronxe are growing plants in a special way with a view to "milking" them for use in medicines, cosmetics and agrochemicals. Several major brands, including Germany's BASF and France's Chanel, have teamed up with Plant Advanced Technologies (PAT) in the hope of securing privileged access to the so-called 'biomolecules' it extracts through the use of a patented technique. Picture taken June 19, 2015. REUTERS/Vincent Kessler

An employee inspects plants in a greenhouse of the Plant Advanced Technologies (PAT) company in Laronxe near Nancy, Eastern France, June 19, 2015. The farmers employed at the site in Laronxe are growing plants in a special way with a view to "milking" them for use in medicines, cosmetics and agrochemicals. Several major brands, including Germany's BASF and France's Chanel, have teamed up with Plant Advanced Technologies (PAT) in the hope of securing privileged access to the so-called 'biomolecules' it extracts through the use of a patented technique. Picture taken June 19, 2015. REUTERS/Vincent Kessler

An employee prepares the exudation of plants roots at the Plant Advanced Technologies (PAT) company greenhouse in Laronxe near Nancy, Eastern France, June 19, 2015. The farmers employed at the site in Laronxe are growing plants in a special way with a view to "milking" them for use in medicines, cosmetics and agrochemicals. Several major brands, including Germany's BASF and France's Chanel, have teamed up with Plant Advanced Technologies (PAT) in the hope of securing privileged access to the so-called 'biomolecules' it extracts through the use of a patented technique. Picture taken June 19, 2015. REUTERS/Vincent Kessler

Plants roots are seen after being misted with mineral salts at the Plant Advanced Technologies (PAT) company greenhouse in Laronxe near Nancy, Eastern France, June 19, 2015. The farmers employed at the site in Laronxe are growing plants in a special way with a view to "milking" them for use in medicines, cosmetics and agrochemicals. Several major brands, including Germany's BASF and France's Chanel, have teamed up with Plant Advanced Technologies (PAT) in the hope of securing privileged access to the so-called 'biomolecules' it extracts through the use of a patented technique. Picture taken June 19, 2015. REUTERS/Vincent Kessler

Plants roots are pictured at the Plant Advanced Technologies (PAT) company greenhouse in Laronxe near Nancy, Eastern France, June 19, 2015. The farmers employed at the site in Laronxe are growing plants in a special way with a view to "milking" them for use in medicines, cosmetics and agrochemicals. Several major brands, including Germany's BASF and France's Chanel, have teamed up with Plant Advanced Technologies (PAT) in the hope of securing privileged access to the so-called 'biomolecules' it extracts through the use of a patented technique. Picture taken June 19, 2015. REUTERS/Vincent Kessler