As a contribution to the exhibition "Glowing Climate - the art lights up in Ørestad" during the Copenhagen Climate Conference 2009, Wahlberg made a lit-up floating tank filled with boiling water, to be placed in the Copenhagen harbour.

The Glowing Climate Festival presented a range of events that opened up alternative avenues of communication for the discussion of climate issues. This work of art was called Temperature in mind (Birgit Johnsen & Hanne Nielsen: Bevidsthed om en temperatur). To read more about the festival, click here.