On this ‘warm sweater day’ all the Dutch school children were called to wear a warm sweater, so that the heater could be set on a lower temperature. This was a national event to create awareness on global warming and to teach the young students about this natural phenomenon. Rapper Ali B and singer Gio promoted it by writing a song dedicated to the consequences of global warming. I was invited to join them on the national campaign day ‘Warme Truien Dag’. It was such a fun day together with all these enthusiastic children!