Copenhill (Amager Bakke) shortly after sunset on a warm summer night in 2018.

The power plant is a part of Copenhagen’s ambitions of being zero carbon by 2025.
Copenhill is a combined heat and power waste-to-energy plant, and is claimed to be the cleanest incineration plant in the world.
It opened in 2017 and produces more clean water than is consumes – and sulphur emission is expected to be reduced by 99.5% and NOx by about 90%
From the 85 m tall roof an all-year artificial ski- and hiking slope (and a climbing wall on the side) is being constructed, and is scheduled to open to the public in 2018!
The chimney is constructed not to emit continuously exhaust, but instead to form water vapour “smoke” rings (!) though I haven’t seen any yet…

Noctilucent Clouds are slightly visible drifting in from the left of the frame.
Later in the evening, after it got darker, the noctilucent clouds became more profound – se here: Copenhill and Amagerværket under noctilucent clouds