In a collaborative effort, Finland's VTT Technical Research Centre and LUT University conducted the Forest CUMP project, focusing on converting biogenic CO2 emissions from pulp mills into raw materials for renewable plastics and e-fuels. The initiative, with a case study at UPM's Kaukas pulp mill in Lappeenranta, aimed to explore the feasibility of utilizing captured CO2 as a carbon source for producing essential industrial products like polyethylene and polypropylene. These plastics play vital roles in packaging, automotive components, textiles, and consumer goods globally. The project's significance lies in addressing the environmental impact of Finland's forest industry, which is a major contributor to biogenic CO2 emissions, with pulp mills alone producing approximately 21 million tonnes annually. By tapping into these emissions, the project seeks to reduce reliance on fossil-based feedstocks in petrochemical supply chains. Through a combination of experimental work and system-level modelling, various technologies for CO2 capture and conversion were evaluated, with a particular focus on electrolysis to generate green hydrogen. This hydrogen could then be used to react with CO2, creating hydrocarbon chains crucial for producing plastic precursors. The project's outcomes underscore the viability of producing renewable fuels and chemicals from pulp mill CO2 and highlight the key areas for technology development and policy support to facilitate market penetration. The findings from Forest CUMP are poised to guide future endeavors in scaling up CO2 utilization within the Nordic pulp and paper sector, contributing to sustainable practices and industrial innovation.