Climate change is a cross-cutting, long-term, global problem that presents policymakers with many challenges in their efforts to respond to the issue. Integrating climate policy objectives into the elaboration and agreement of policy measures in other sectors represents one promising method for ensuring coherent policies that respond adequately to the climate change challenge. This book explores the integration of long-term climate policy objectives into EU energy policy. It engages in-depth empirical analysis on the integration of climate policy objectives into renewable energy policy; energy performance of buildings; and policies in support of natural gas importing infrastructure. The book describes insufficient levels of climate policy integration across these areas to achieve the long-term policy goals. A conceptual framework to find reasons for insufficient integration levels is developed and applied. This book is a valuable resource for students, researchers, academics and policymakers interested in environmental, climate change and energy policy development in the EU, particularly from the perspective of long-term policy challenges.The book adds to scholarly literature on policy integration and EU integration, and contributes to new and developing research about EU decarbonisation.