Chairman of the Management Board of Sibur petrochemical company Dmitry Konov attends a session of the St. Petersburg International Economic Forum (SPIEF) in Saint Petersburg, Russia, June 4, 2021. REUTERS/Evgenia Novozhenina

Chairman of the Management Board of Sibur petrochemical company Dmitry Konov attends a session of the St. Petersburg International Economic Forum (SPIEF) in Saint Petersburg, Russia, June 4, 2021. REUTERS/Evgenia Novozhenina

Chairman of the Management Board of Sibur petrochemical company Dmitry Konov attends a session of the St. Petersburg International Economic Forum (SPIEF) in Saint Petersburg, Russia, June 4, 2021. REUTERS/Evgenia Novozhenina

Chairman of the Management Board of Sibur petrochemical company Dmitry Konov attends a session of the St. Petersburg International Economic Forum (SPIEF) in Saint Petersburg, Russia, June 3, 2021. REUTERS/Evgenia Novozhenina

Workers pedal past a Sinopec Shanghai Petrochemical refinery in Shihua, about 70kms from Shanghai, July 26, 2001. The characters on top read "Unity, Hard work, Practical, Be First.

Children ride bikes in the Mutange neighbourhood, which has been affected by rock salt mining by the petrochemical company Braskem, in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

Workers pass in front of a tank at a chlorine-soda plant of the petrochemical company Braskem in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

Workers labor at a facility of the petrochemical company Braskem in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

Marcio da Rocha Cavalcante, 47, is pictured in an apartment with cracks linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 27, 2020. Picture taken January 27, 2020. REUTERS/Amanda Perobelli

A child plays with horses in the Mutange neighbourhood, which has been affected by rock salt mining by the petrochemical company Braskem, in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

A man passes subsoil monitoring equipment installed to track effects of rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 29, 2020. Picture taken January 29, 2020. REUTERS/Amanda Perobelli

Workers labor at a facility of the petrochemical company Braskem in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

In the northeastern Brazilian city of Maceio, a number of salt mines owned and operated by petrochemical firm Braskem have over time eroded the ground underneath a large chunk of the city.

Jose Rinaldo Januario, 47, is pictured in his house next to cracks linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 29, 2020. Picture taken January 29, 2020. REUTERS/Amanda Perobelli

A dog is pictured beside subsoil monitoring equipment installed to track effects of rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 29, 2020. Picture taken January 29, 2020. REUTERS/Amanda Perobelli

Horses graze outside of a a building with cracks linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 27, 2020. Picture taken January 27, 2020. REUTERS/Amanda Perobelli

A crack monitor is attached to the wall of a house with damage linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 29, 2020. Picture taken January 29, 2020. REUTERS/Amanda Perobelli

A man hangs laundry near a mining equipment used by the petrochemical company Braskem in Maceio, Brazil January 28, 2020. Picture taken January 28, 2020. REUTERS/Amanda Perobelli

Workers are pictured in a control room at a chlorine-soda plant of the petrochemical company Braskem in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

People wait at a Braskem service center run for residents affected by the petrochemical company's rock salt mining in Maceio, Brazil January 30, 2020. Picture taken January 30, 2020. REUTERS/Amanda Perobelli

A building with cracks linked to rock salt mining by the petrochemical company Braskem is seen in Maceio, Brazil January 27, 2020. Picture taken January 27, 2020. REUTERS/Amanda Perobelli

Jose Rinaldo Januario, 47, shows a damage in his house linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 28, 2020. Picture taken January 28, 2020. REUTERS/Amanda Perobelli

A condemned building sits in front of mining equipment used by the petrochemical company Braskem in Maceio, Brazil January 28, 2020. Picture taken January 28, 2020. REUTERS/Amanda Perobelli

A child rides a bicycle past subsoil monitoring equipment installed to track effects of rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 29, 2020. Picture taken January 29, 2020. REUTERS/Amanda Perobelli

Joeliton Barbosa Goes, 45, stands in his house next to a crack linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 28, 2020. Picture taken January 28, 2020. REUTERS/Amanda Perobelli

Jose Rinaldo Januario, 47, is pictured outside his house next to cracks linked to rock salt mining by the petrochemical company Braskem in Maceio, Brazil January 28, 2020. Picture taken January 28, 2020. REUTERS/Amanda Perobelli

A process tower flies through air after exploding at the TPC Group Petrochemical Plant, after an earlier massive explosion sparked a blazeÊat the plant in Port Neches,ÊTexas, U.S., November 27, 2019.Ê REUTERS/Erwin Seba

A process tower flies through the air after exploding at the TPC Group Petrochemical Plant, after an earlier massive explosion sparked a blaze at the plant in Port Neches, Texas, U.S., November 27, 2019. REUTERS/Erwin Seba TPX IMAGES OF THE DAY

Flames are seen after a massive explosion that sparked a blaze at a Texas petrochemical plant in Port Neches, Texas, U.S., November 27, 2019.  REUTERS/Erwin Seba

Flames are seen after a massive explosion that sparked a blaze at a Texas petrochemical plant in Port Neches, Texas, U.S., November 27, 2019.  REUTERS/Erwin Seba

A man is seen at an exit of the refinery plants of Chambroad Petrochemicals in Binzhou, Shandong province, China October 24, 2019. Picture taken October 24, 2019. REUTERS/Stringer

A man works on removing an oil spill on Coruripe beach, Alagoas state, Brazil October 14, 2019. REUTERS/Adriano Machado

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex with Royal Dutch Shell Chairman Chad Holliday (R) in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex with U.S. Secretary of Energy Rick Perry and Shell Oil Company President Gretchen Watkins in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump waves as he boards Air Force One to return to his resort in New Jersey after touring a petrochemical plant near Pittsburgh International Airport in Pittsburgh, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

A worker rests his head on the fence around the media area as President Donald Trump speaks for more than an hour at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex with Vice President of Shell Chemical Appalachia Hilary Mercer, Shell Oil Company President Gretchen Watkins, U.S. Secretary of Energy Rick Perry and others in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

A worker rests his head on the fence around the media area as President Donald Trump speaks for more than an hour at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex with Shell Oil Company President Gretchen Watkins and Vice President of Shell Chemical Appalachia Hilary Mercer in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex with U.S. Secretary of Energy Rick Perry, Shell Oil Company President Gretchen Watkins and Vice President of Shell Chemical Appalachia Hilary Mercer in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex with U.S. Secretary of Energy Rick Perry, Shell Oil Company President Gretchen Watkins, Vice President of Shell Chemical Appalachia Hilary Mercer and others in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump tours the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump arrives to speak at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

Plant workers listen to U.S. President Donald Trump as he speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

Plant workers capture video of U.S. President Donald Trump with their phones as he speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

Plant workers listen as U.S. President Donald Trump speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

A worker who refused to give his name, but confirmed he was intentionally turning his back, stands behind a U.S. Secret Service agent facing away as President Donald Trump speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump is seen in a television camera viewfinder as he speaks at the Shell Pennsylvania Petrochemicals Complex in Monaco, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump is seen in a television camera viewfinder as he speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

U.S. President Donald Trump speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

A worker who refused to give his name, but confirmed he was intentionally turning his back, stands behind a U.S. Secret Service agent facing away as President Donald Trump speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

A worker who refused to give his name but confirmed he was intentionally turning his back stands behind a U.S. Secret Service agent facing away as President Donald Trump speaks about U.S. energy production and manufacturing at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump speaks about U.S. energy production and manufacturing at the Shell Pennsylvania Petrochemicals Complex in Monaco, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

Environmental Protection Agency (EPA) administrator Andrew Wheeler and U.S. Energy Secretary Rick Perry listen along with other officilas as U.S. President Donald Trump speaks about U.S. energy production and manufacturing at the Shell Pennsylvania Petrochemicals Complex in Monaco, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump speaks about U.S. energy production and manufacturing at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

Plant workers listen as U.S. President Donald Trump speaks about U.S. energy production and manufacturing at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump speaks at the Shell Pennsylvania Petrochemicals Complex in Monaca, Pennsylvania, U.S. August 13, 2019. REUTERS/Jonathan Ernst