This paper offers an overview of the mandate of the European Central Bank (ECB), as defined by its objectives, the instruments available to achieve them and the constitutional framework that the ECB shall observe in pursuing them. The objectives include the primary objective of maintaining price stability and the secondary objective of supporting the general economic policies in the Union. The price stability objective enjoys primacy amongst the ECB objectives. The Treaties do not provide for a hierarchy of the "general economic policies" that the ECB shall support, although a number of criteria derived from primary law can help in guiding the ECB's priorities in this respect. The ECB is also tasked with contributing to the "smooth conduct of policies pursued by the competent authorities relating to the prudential supervision of credit institutions and the stability of the financial system". As for the instruments available, these include both measures that directly pursue the objectives and measures that are instrumental in achieving them. Finally, the other constitutional rules that set out the framework within which the ECB pursues its objectives include the principles of conferral, institutional balance, proportionality, equal treatment and non-discrimination, as well as the principle of an open market economy and the prohibition of monetary financing.

This paper analyses the implications of climate change for the conduct of monetary policy in the euro area. It first investigates macroeconomic and financial risks stemming from climate change and from policies aimed at climate mitigation and adaptation, as well as the regulatory and fiscal effects of reducing carbon emissions. In this context, it assesses the need to adapt macroeconomic models and the Eurosystem/ECB staff economic projections underlying the monetary policy decisions. It further considers the implications of climate change for the conduct of monetary policy, in particular the implications for the transmission of monetary policy, the natural rate of interest and the correct identification of shocks. Model simulations using the ECB's New Area-Wide Model (NAWM) illustrate how the interactions of climate change, financial and fiscal fragilities could significantly restrict the ability of monetary policy to respond to standard business cycle fluctuations. The paper concludes with an analysis of a set of potential monetary policy measures to address climate risks, insofar as they are in line with the ECB's mandate.