

This report focuses on the risks of climate change to development in Sub-Saharan Africa, South East Asia and South Asia. Building on the 2012 report, Turn Down the Heat: Why a 4°C Warmer World Must be Avoided, this new scientific analysis examines the likely impacts of present day, 2°C and 4°C warming on agricultural production, water resources, and coastal vulnerability for affected populations. It finds many significant climate and development impacts are already being felt in some regions, and in some cases multiple threats of increasing extreme heat waves, sea level rise, more severe storms, droughts and floods are expected to have further severe negative implications for the poorest. Climate related extreme events could push households below the poverty trap threshold. High temperature extremes appear likely to affect yields of rice, wheat, maize and other important crops, adversely affecting food security. Promoting economic growth and the eradication of poverty and inequality will thus be an increasingly challenging task under future climate change.
The concept of green economy has received significant international attention over the past few years both as a tool to address the 2008 financial crisis as well as one of the two themes for the 2012 United Nations Conference on Sustainable Development (Rio+20). This has resulted in a rapidly expanding literature and emerging international practice as well as new partnerships, coalitions and platforms.

Green economy in the context of sustainable development and poverty eradication was one of two themes at the UN Conference on Sustainable Development held in Rio de Janeiro in June 2012 (or Rio+20).
Negotiations on green economy in the lead up to Rio+20 were challenging and the concept became a source of controversy and disagreement. Despite these challenges, governments agreed at Rio+20 to frame the green economy as an important tool for sustainable development; one that is inclusive and can drive economic growth, employment, and poverty eradication, whilst maintaining the healthy functioning of the Earth’s ecosystems. Importantly, the outcome document also recognises that capacity building, information exchange and experience sharing will be critical for implementing green economy policies. In this context, the document invites the UN to work with partners to provide support to developing countries and to develop toolboxes, best practices, methodologies and models to aid green economy policy design and implementation.
In this Issue 4 of A Guidebook to the Green Economy, the focus turns to the various international initiatives that are supporting countries and stakeholders to implement the green economy worldwide by providing a range of services including information exchange, data management, capacity building, finance, and technology services. In doing so, it provides a resource guide to the various existing international green economy platforms, partnerships, programs, funds and other initiatives. The guidebook also aims to map out many of the key actors involved in implementing and supporting the various green economy initiatives, the key services that they provide to countries, and the geographical reach of these initiatives which are now spreading the green economy across the globe. The intent is to provide useful information to practitioners, countries and stakeholders which may assist with coordination and coherence and help countries to find the support that they need. As with the previous UNDESA guidebooks, the review focuses on green economy and the related concepts of green growth and low-carbon development.