In 2014, Kara/Noveren inaugurated a new, energy-efficient waste-to-energy plant in Roskilde. It was designed by the Dutch architect Erick Van Egeraat and is known as Energitårnet ("The Energy Tower").

The building is the result of an architectural competition won by Erick Van Egeraat in 2010.

The building has a two layered façade, the outer layer consists of amber-coloured aluminium plates with laser-cut circular openings. A backlighting scheme creates a spark which for a few minutes every hour gradually illuminates the entire building.