At Maretarium, the theme for 2021 is the fight against the climate change. The City of Kotka is aiming with the so-called “Hinku commitment” to carbon neutrality by 2030. Maretarium’s exhibition discusses the measures of the Kotka climate programme and asks visitors what everyone considers to be the most important action in the fight against climate change in Finland and what they are prepared to do to mitigate the climate change. Visitors can fill out their own commitment form and hang it on the exhibition wall for others to read.