"This excellent work will be of interest to those working in environmental and climate policy integration and to anyone trying to promote climate-change policy in the EU. It contributes to the emerging body of research on CPI by offering a well-thought-through framework for measuring and explaining different levels of integration – particularly useful for assessing climate mainstreaming in policy output. For the policy process, stakeholder participation may need to be assessed using other indicators. Pro-climate stakeholders perhaps chose not to be more involved in renewable energy and energy conservation policies because DG Energy was pursing the same objectives – to increase the share of renewables in the EU and reduce energy consumption." – Environmental Politics, Catarina Cardoso