Fifty years of development co-operation practice have yielded lessons on effective aid4, summarised in the principles of ownership, alignment, harmonisation, results and mutual accountability, which are supported and referred to as best practice across the development co-operation community. In the Busan Fourth High-Level Forum on Aid Effectiveness (2011), climate finance was formally recognised as a core development finance issue, with the common goal to “support national climate change policy and planning as an integral part of developing countries overall national development plans, and ensure that - where appropriate - these measures are financed, delivered and monitored through developing countries' systems in a transparent manner” . There are cobenefits and trade-offs in financing sustainable development and climate change goals simultaneously.