The three stamps in the climate change stamp sheet depict the dramatic effects of climate change that are expected in the near future if we allow the climate to continue getting warmer at the current rate. The particular focus of the stamps is the effect of climate change on Finnish weather conditions, nature and society.
The stamps, which are designed by Timo Berry, are made with heat-pressed ink that will change color when touched with a finger. By touching the stamp with your finger, you can see what we can expect in Finland if the constant warming of the climate is not brought under control.
A few of these unique sheets are still available at https://stampcenter.com/finland-2019-climate-change-souvenir-sheet-heat-sensitive/