The transition towards environmentally sustainable, low-emissions and climate-resilient development pathways is critical for countries’ ability to achieve the 2030 Agenda for Sustainable Development. As a result, development co-operation providers recognise the need to better support developing countries in this transition. In response to commitments on environment and climate change by Members of the OECD Development Assistance Committee (DAC) taken at their High-Level Meeting (HLM) in November 2020, this report provides information on: 1) steps taken to pursue more co-ordinated approaches in supporting climate change and environmental objectives; 2) efforts to systematically integrate international environment and climate goals into development co-operation policies; 3) specific approaches to support developing countries in achieving transitions that are environmentally sustainable, low-emissions and climate-resilient; and 4) DAC Members’ policies to better address the particular needs of Small Island Developing States (SIDS).