I have used a simplified graphic  of the traffic signal/light whose meaning is known immediately and  internationally,  to highlight the "GO GREEN" message.

     To start,  Germany's national colours - red, gold and black are used.

      The topmost, red 'light' with its nuclear symbol,  indicates  the call to  put a 'stop' to nuclear power.  

    The yellow 'light', depicting  simplified smoky chimney-stacks, is a warning against the use of climate-changing charcoal.

      Beneath these two �hold back� lights,  the colour and concept of green - the   �go light�  depicts the  recycling/sustainabilty symbol.

    The logo is simple, precise and speaks with authority.

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