In the Treaties the European Union professes the principles of sustainability, the protection of the environment and the fight against the causes and effects of climate change. Regularly these ambitions are in conflict with other aims of the EU like economic growth, agriculture and industrial policy.

Since 2008 COMECE has been engaged with the topic of climate change and regularly stressed the necessity of an ecological conversion and a different and more sober style of life. In his encyclical «Laudato si» Pope Francis has flagged up this idea with his concept of an «integrate ecology» that underscores the link between the protection of the environment and climate, the fight against poverty, social justice, economy and politics.