Mainz, Germany. 19th Nov, 2020. A note on the door to the classroom indicates that measurements are taking place. A classroom at IGS Mainz Bretzenheim was equipped with a fume cupboard on a trial basis. The city of Mainz wants to equip more than 300 classrooms with simple exhaust air systems invented by the Max Planck Institute for Chemistry. (to dpa "Mainz wants to equip 300 classrooms with simple ventilation systems") Credit: Andreas Arnold/dpa/Alamy Live News

GLIX-115-2DC77WJ

Mainz, Germany. 19th Nov, 2020. A note on the door to the classroom indicates that measurements are taking place. A classroom at IGS Mainz Bretzenheim was equipped with a fume cupboard on a trial basis. The city of Mainz wants to equip more than 300 classrooms with simple exhaust air systems invented by the Max Planck Institute for Chemistry. (to dpa
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Mainz, Germany. 19th Nov, 2020. A note on the door to the classroom indicates that measurements are taking place. A classroom at IGS Mainz Bretzenheim was equipped with a fume cupboard on a trial basis. The city of Mainz wants to equip more than 300 classrooms with simple exhaust air systems invented by the Max Planck Institute for Chemistry. (to dpa "Mainz wants to equip 300 classrooms with simple ventilation systems") Credit: Andreas Arnold/dpa/Alamy Live News

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