Die Siebzigerjahre :
Smogalarm im Ruhrgebiet, saurer Regen, sterbende Fichten im Bayerischen Wald.
Damals waren Filteranlagen für die Schlote im Ruhrgebiet die Lösung.
www.ist.fraunhofer.deThe Seventies :
Smog alert in the Ruhr area, acid rain, dying spruce trees in the Bavarian Forest.
In those days, the solution was filter systems for the smokestacks in the Ruhr area.
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