Climate change is altering the ecological and social systems that underpin human well-being and economic activity, and developing countries are particularly vulnerable to its impact on the growth and sustainable development prospects of every sector and community. Being part of the solution requires all providers of development co-operation to align their activities with the objectives of the Paris Agreement. However many still lack the mandates, resources, incentives and strategies to do so. This report outlines how providers can make changes at home, in developing countries and in the international development co-operation system, to help create low-emissions, climate-resilient economies, and how they can avoid supporting activities that lock the world into an unsustainable future.