Lecturer and research scientist Sonia Henry (C), from Thionville-Yutz University Institute of Technology, manipulates soil samples in front of two of her students to study the pollution of soils and plants from the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

Lecturer and research scientist Sonia Henry, from Thionville-Yutz University Institute of Technology, touches a fig tree in the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

Lecturer and research scientist Sonia Henry (2nd/R), from Thionville-Yutz University Institute of Technology, manipulates soil samples in front of two of her students to study the pollution of soils and plants from the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

Students of lecturer and research scientist Sonia Henry, from Thionville-Yutz University Institute of Technology, collect soil samples to study the pollution of soils and plants from the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

A student of lecturer and research scientist Sonia Henry, from Thionville-Yutz University Institute of Technology, reviews plant samples to study the pollution of soils and plants from the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

Lecturer and research scientist Sonia Henry, from Thionville-Yutz University Institute of Technology, sows seeds in the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

Lecturer and research scientist Sonia Henry, from Thionville-Yutz University Institute of Technology, sows seeds in the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)

Lecturer and research scientist Sonia Henry (C), from Thionville-Yutz University Institute of Technology, manipulates soil samples in front of two of her students to study the pollution of soils and plants from the industrial wasteland of the U4 blast furnaceon in Uckange, north-eastern France on May 21, 2026. Vegetation grows among the disused blast furnaces of Uckange, remnants of Moselle's steel industry, where plants are used in an experimental natural method to decontaminate soil saturated with hydrocarbons and metals. (Photo by Jean-Christophe Verhaegen / AFP via Getty Images)