Wetlands are crucial biodiversity hotspots that play a significant role in global carbon cycles. They are critical habitats for numerous endemic species of fauna and flora, and they are vital elements for rural communities and their economy. Despite their essential ecological and economic importance, wetlands are globally disappearing or becoming polluted at an alarming rate, making them among Europe's most endangered ecosystems. The associated environmental damage, particularly the twin issues of increasing GHG emissions and devastating biodiversity loss, are core crises that the EU must address in the near future. Not only in Europe but also in Denmark, most of these wetlands are drained mainly for agriculture, releasing nearly half of the agricultural sector's greenhouse gas emissions, causing disproportionate climate damage costs annually. Restoring wetland areas, using them sustainably, and pioneering an innovative economic sector is a rising opportunity for the future. However, there are still relevant knowledge gaps in wetland biogeochemistry that have only been partially addressed, hindering the straightforward incorporation of wetland restoration as part of a portfolio of land-based climate change mitigation options.