This textbook intends to bridge the gap between knowledge about global warming and practical implementation in the political process of the necessary measures for the reduction of greenhouse gas (GHG) emissions. It therefore deals with climatology, economics and political science in five sections: - The state of scientific knowledge of climate change, the influencing factors, the man-made effects and the monitoring of GHG sources and sinks. Topics covered include: the transformation of scientific results into politically achievable aims, the criteria for the allocation of the reduction goals, and the GHG inventories of European countries; the relevant political and economical instruments, such as voluntary approaches, the carbon/energy-tax and Activities Implemented Jointly (AIJ) and their working principles; the instrument of tradeable emission permits (the US Acid Rain Programme as an example) and possible designs of a system for CO2 on the national and international level; and comparison and summaries of the efficacy, the cost-efficiency, the achievability and political acceptability of the different instruments.

Climate change poses important challenges to research and policy. Within three decades, an issue that was initially confined to the attention of a few scientists became the topic of large-scale research programmes, national and European policies and an international Convention. While significant uncertainties remain on the timing and scale of the changes to be expected and of their impacts, an appreci ation emerged of the high ecological, economic, political and social stakes involved and lead to governmental, business and citizens' initiatives. After focusing on the understanding of climate processes and the possible impacts of climate change on ecosystems, European research - and international research more generally - started addressing also the social, economic and policy causes of and responses to climate change. In the meantime, local, national and European measures started being developed to mitigate carbon dioxide emissions, a European target was agreed to achieve the stabilization of carbon dioxide by 2000 at the levels of 1990, the Framework Convention on Climate Change (FCCC) was adopted and was followed by its Kyoto Protocol.