It was impossible for the Paris Climate Conference (COP 21) to fail as the climate warms up rapidly. Indeed, the Conference of Parties (COP) adopted the agreement with jubilation. This moment will live on in the memories of the participants. An innovative treaty, the Paris Agreement introduces a new technique to fight against climate change as well as a new combat logic. The innovations concerning the fight against global warming are bringing about evolutions in both treaty and environmental law. The Paris Agreement is of great architectural and normative complexity. In particular, it increases the scope of several principles of environmental law. For example, it is the first time that a universal multilateral agreement contains the concept of climate justice. Adopting a new logic of combating global warming, allows the Paris Agreement to highlight its specific dimensions. It can be considered as both a global agreement to renew our ambition of climate protection, while also being a dynamic agreement that reinforces this common climate ambition, to achieve our goal of limiting global warming to no more than 2 ° C.