The Food and Agriculture Organization of the United Nations (FAO) has produced a new sourcebook for how to implement "climate-smart" approaches to agriculture. The online tool was launched at the Agriculture Action Day on the sidelines of the COP23 climate summit in Bonn. Climate-Smart Agriculture Sourcebook - Second Edition 2017 comprises a wide range of knowledge and expertise to help make the agricultural sectors more sustainable and productive while also contributing to food security and lower carbon intensity. This second edition of the sourcebook adds new modules addressing climate change adaptation and mitigation, integrated production systems, knowledge-support systems for rural producers, the role of gender, and how to improve implementation. It focuses on production issues related to crops, livestock, forestry, fisheries and aquaculture, and integrated systems, as well as on the use of resources such as water, soils and land, genetic resources, and energy. Food systems and value chains--bringing in factors ranging from fertilizers to refrigeration--are also incorporated as potential areas for optimization.