In order to cope with anthropogenic climate change, the European Union is currently undertaking political and legal actions for three basic tasks: the reversal of economic patterns, the improvement of health and quality of life, environmental protection. The European Green Deal is the political agenda towards zero emission by 2050, and the EU Climate Law represents the main legal step for achieving such ambitious result. This essay focuses on the scientific reasons that enhance such quick response, introducing the EU Green Deal and the EUCL, in order to critically address some crucial issues deriving from such policies and legislation.