Central banks’ activities in the field of climate change are determined by their mandates. Their primary role is hence to minimize the potential negative impacts of physical and transitory risks on price and financial stability. In doing so, they use tools and procedures that are described in more detail on the subpages Monetary Policy and Climate Change and Financial Stability and Climate Change. When managing their own investment reserves, central banks may prioritize  purchase of securities from issuers with lower carbon intensity. By optimizing organizational and operational procedures, they strive to reduce their own carbon footprint. However, central banks do not have power to make commitments to reduce emissions at the national level. The key responsibilities for mitigating the effects of climate change lie on the executive and legislative powers.