At national levels, a wide range of policy, administrative and legal instruments has been established to solve environmental problems. These instruments include national environmental action plans, and sectoral and umbrella environmental policies and laws.
在国家一级，制定了旨在解决环境问题的各种各样的政策、管理工具和法律工具，其中包括国家环境行动计划、部门以及总体环境政策和法律。