This is a comprehensive, detailed guidebook for assessing options that address the risks posed by climatic change induced by human activity. Drawing on the expertise of over 25 specialists, the book provides guidance for the analysis of options to mitigate greenhouse gas emissions in energy, forestry, agriculture, and waste management. It describes the key steps involved in conducting an assessment in different sectors, and also discusses selected models that may be applied to support an analysis. Audience: The book is primarily intended for analysts conducting studies at a national level in developing countries and countries with economies in transition. A useful compendium of information for analysts in other countries and also of interest to scientists and policy makers involved in the field of global climate change who wish to better understand how a mitigation assessment may be conducted.