Mainstreaming climate change adaptation into planning and budgeting processes is supported by the UNDP. Mainstreaming involves integrally reflecting climate risks and adaptation options in decision-making at various policy levels and stages. The core elements of the mainstreaming process include integrating adaptation strategies into policies, costing priority adaptation actions, establishing institutional arrangements, integrating adaptation actions into planning and budgeting systems, and establishing monitoring and evaluation systems. Effective climate budgeting can help implement adaptation plans by translating policy into action through national and local budgets. Challenges to mainstreaming include limited understanding of climate impacts, lack of incentives, and weak institutional coordination.