Rebecca Currie embraces her five-year-old son Mathew Richards after winning a High Court battle over noxious emissions from Walleys Quarry, a landfill site in Silverdale, in London, Britain, September 16, 2021. REUTERS/Carl Recine

Rebecca Currie embraces her five-year-old son Mathew Richards after winning a High Court battle over noxious emissions from Walleys Quarry, a landfill site in Silverdale, in London, Britain, September 16, 2021. REUTERS/Carl Recine

Rebecca Currie embraces her five-year-old son Mathew Richards after winning a High Court battle over noxious emissions from Walleys Quarry, a landfill site in Silverdale, in London, Britain, September 16, 2021. REUTERS/Carl Recine

Rebecca Currie embraces her five-year-old son Mathew Richards after winning a High Court battle over noxious emissions from Walleys Quarry, a landfill site in Silverdale, in London, Britain, September 16, 2021. REUTERS/Carl Recine

Tom Currie speaks to five-year-old Mathew Richards, after their family won a High Court battle over noxious emissions from Walleys Quarry, a landfill site in Silverdale, in London, Britain, September 16, 2021. REUTERS/Carl Recine

Tom Currie comforts five-year-old Mathew Richards, after their family won a High Court battle over noxious emissions from Walleys Quarry, a landfill site in Silverdale, in London, Britain, September 16, 2021. REUTERS/Carl Recine

Prosecutor Elke Hoppenworth attends the start of a trial against four former Volkswagen executives, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

A former Volkswagen executive walks at the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

The presiding judge Christian Schuetz attends at the start of the trial of the four Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

A former Volkswagen executive is seen at the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive sits next to his lawyers at the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive attends the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive sits while attending the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive stands at the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive talks to his lawyer Annette Voges at the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive is seen at the start of his trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive talks to his lawyers before the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive talks to his lawyer Annette Voges before the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive talks to his lawyer Annette Voges before the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive and his lawyers Marc Langrock and Annette Voges attend the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive talks to his lawyer Andreas Huettl before his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

Prosecutors Andre Schmidt, Elke Hoppenworth and Daniel Facca attend the start of a trial against four former Volkswagen executives, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool

Prosecutor Elke Hoppenworth attends the start of a trial against four former Volkswagen executives, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool

Prosecutor Elke Hoppenworth attends the start of a trial against four former Volkswagen executives, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

A former Volkswagen executive and his lawyer Andreas Huettl attend the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive talks to his lawyers Andreas Huettl and Sandra Korzenski before his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

One of the four defendants is seen at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

One of the four defendants is seen at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

One of the four defendants is seen at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

One of the four defendants sits at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS PARTS OF THE IMAGE ARE PIXELATED AT SOURCE.

A former Volkswagen executive attends the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive attends the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

A former Volkswagen executive attends the start of his trial, charged with misconduct over his role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Former Chief Executive Winterkorn's trial will start at a later date. REUTERS/Fabian Bimmer/Pool PARTS OF THE IMAGE ARE PIXELATED FOR PRIVACY REASONS.

One of the four defendants is seen at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

One of the four defendants is seen at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

A combination picture shows the four defendants at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

One of the four defendants is seen at the start of the trial of former Volkswagen executives charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. Julian Stratenschulte/Pool via REUTERS

General view of the court room where four former Volkswagen executives go on trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. REUTERS/Fabian Bimmer/Pool

General view of the court room where four former Volkswagen executives go on trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. REUTERS/Fabian Bimmer/Pool

General view of the court room where four former Volkswagen executives go on trial, charged with misconduct over their role in the carmaker's manipulation of diesel emissions testing, in Brunswick, Germany September 16, 2021. REUTERS/Fabian Bimmer/Pool

Britain's Prince Charles meets with transport workers and 'Net Zero Heroes' involved in Exeter City Council's ambition to achieve Net Zero Heroes carbon emissions by 2030, in Exeter, Britain July 19, 2021. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets with transport workers and 'Net Zero Heroes' involved in Exeter City Council's ambition to achieve Net Zero Heroes carbon emissions by 2030, in Exeter, Britain July 19, 2021. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets with transport workers and 'Net Zero Heroes' involved in Exeter City Council's ambition to achieve Net Zero Heroes carbon emissions by 2030, in Exeter, Britain July 19, 2021. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets with transport workers and 'Net Zero Heroes' involved in Exeter City Council's ambition to achieve Net Zero Heroes carbon emissions by 2030, in Exeter, Britain July 19, 2021. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets with transport workers and 'Net Zero Heroes' involved in Exeter City Council's ambition to achieve Net Zero Heroes carbon emissions by 2030, in Exeter, Britain July 19, 2021. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets with transport workers and 'Net Zero Heroes' involved in Exeter City Council's ambition to achieve Net Zero Heroes carbon emissions by 2030, in Exeter, Britain July 19, 2021. Arthur Edwards/Pool via REUTERS

The logo of a zero emission vehicle is pictured during a launch event for a hydrogen electrolysis plant at Shell's Rhineland refinery in Wesseling near Cologne, Germany, July 2, 2021. REUTERS/Thilo Schmuelgen

U.S. President Joe Biden hands Speaker of the House Nancy Pelosi the pen after signing S.J.Res.14, relating to "Oil and Natural Gas Sector: Emission Standards for New, Reconstructed and Modified Sources Review" at the White House in Washington, U.S. June 30, 2021. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY

Cement manufacturers are among the leading producers of climate-damaging carbon dioxide.

U.S. House Speaker Nancy Pelosi (D-CA), flanked by fellow House Democrats, signs one of a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA), flanked by fellow House Democrats, signs one of a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) poses with a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, which she signed flanked by fellow House Democrats at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) speaks with participants including Rep. Maxine Waters (D-CA) after signing a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) speaks with Rep. Maxine Waters (D-CA) after signing a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) stops at a metal detector as she returns to the House floor after signing a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) arrives to sign a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) departs after signing a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) handles a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, which she signed flanked by fellow House Democrats at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst

U.S. House Speaker Nancy Pelosi (D-CA) holds one of a series of resolutions to roll back Trump-era changes to rules regarding payday lending, methane emissions and equal employment, which she signed flanked by fellow House Democrats at the Capitol in Washington, U.S. June 29, 2021. REUTERS/Jonathan Ernst