In order to achieve the goals of carbon (C) neutrality within next 20 year, municipalities worldwide need to increasingly apply negative emission technologies. In our latest Policy Brief published in Frontiers in Environmental Science we focus on the main principles of urban demonstration areas using biochars for C sequestration and explore the lessons learned from a co-creation process of one such park, Hyväntoivonpuisto in Helsinki, Finland.
We found that the demonstration sites of urban C sinks in public parks must be safe, visible and scientifically sound for reliable and cost-effective verification of carbon sequestration. We find that different interests can be arbitrated and that synergy that emerges from co-creation of urban C sink parks between stakeholders (scientists, city officials, companies, and citizens) can result in demo areas with maximized potential for impact, dissemination and consideration of principles of scientific experimentation.
We acknowledge the funding for the Carbon Lane project by EIT Climate KIC Early innovation project # 190365, the full report the policy brief is based on is available at https://www.aalto.fi/fi/Carla. We also acknowledge the funding from Maiju ja Yrjö Rikalan Puutarhasäätiö for funding the first follow-up project of the Carbon Lane park, #Hiilipuisto. We are very grateful also for all the stakeholders and scientists who participated the workshops providing input for both the principles and design for the urban C sink parks.