This article discusses the need to harmonize legal environmental standards under the legal systems of MERCOSUR countries (Argentina, Brazil, Paraguay, Uruguay and Venezuela). The main MERCOSUR legal texts considers harmonization essential to advance regional integration processes, but through literature review the incorporation of these determinations is slow and only certain similarities in the environmental field appears on all domestic jurisdictions, mainly in constitutional texts. In order to contribute to this harmonization process, it will be presented the main constitutional and infra forecasts of the Member States and argued how it has become apparent that these States should move forward in this process to achieve this important and necessary harmonization of the environment field.
MERCOSUR; harmonization; environment; environmental law