Mitigating and adapting to climate change increases the cost of development. Considerable resources are needed in addition to the present levels of official development assistance (ODA) to complement rather than undermine the efforts and progress towards the achievement of development objectives including Millennium Development Goals (MDGs). The panoply of types and sources of financial flows is extremely broad and includes both new instruments established to address climate change as well as core development and investment finance shifting towards low carbon solutions and adaptation. In this complex landscape, keeping track of financial support to adaptation and mitigation will be a challenge.