The objective of this article is to contribute with the analyticalcritical construction of democratic environmental law in Latin America, addressing it as a historical construction in two different stages, starting with Rio 92 (planning) and Rio+20 (concretion). The main question is to find out if this region already exceeded planning and went into a concretion stage by guaranteeing standards of Principle 10 by signing a regional agreement. To achieve this objective, a dogmatic research of a descriptive, analytical and prescriptive nature is followed, using the technique of primary documentary sources analysis and observing the negotiations of the regional agreement. This is the result of a research characterizing environmental justice and ...