COPENHAGEN|Amager Slope - a very unconventional waste to energy plant under construct

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Since 2013 there is in Copenhagen a very unconventional waste to energy plant under construction. It will get an observation deck and ski pists on its roof and the chimney will not emit the exhausts continously, but in form of smoke rings instead. See http://www.skyscrapercity.com/showthread.php?t=1669975 and https://www.youtube.com/watch?v=_GL3xAaIcvI .