Years passed since the first laws on decentralization and environmental concerns as issues of general interest continue to increase as local authorities have to deal with even more intertwined laws and competences, which cause their action in favor of environnemental management to become very complex. The study of local authorities environmental interventions shows how environnemental management is split between them and central state through its decentralized bodies. A kind of partnership between these institutions is then to be for successful environmental management. So after making the distinction between the different areas of environment inviting the intervention of local authorities either solely or with the assistance of the decentralized bodies of the State that it is easier to understand the implementation of policies public local environment, starting from the financing of environmental management mode. To implement environmental protection policies, he mentions several funding sources. The important part is provided by the local authorities (more than 85% of expenditure related to the environment) by the local environmental taxation. We cannot complete the study of local public policies for the environment without focusing on possible difficulties in implementing these policies. It could be related to funding constraints as those of normative order. But in any event, the judge has broad powers to rule in favor of environmental protection.