If we translate the debate on the climate security nexus to a more operational level, we inevitably arrive at the question of whether and to what extent the fight against climate change should be included in the mandate of current and future UN peacekeeping missions. MINUSMA was the first peacekeeping mission for which the mandate was explicitly extended to include climate security aspects, and a climate security expert is now appointed within the framework of the UNSOM mission in Somalia. In this policy brief, we apply the debate to the largest UN peacekeeping operation in the world so far, namely MONUSCO in DRC.