This article addresses the fundamental question of how siyasah syar'iyyah can integrate the principles of the Green Constitution to guarantee intergenerational ecological justice in the management of natural resources in Indonesia. Against the backdrop of rampant mining exploitation and deforestation that threaten environmental sustainability with nickel mining in Central Halmahera alone causing damage to 299 watersheds and deforestation of 27,900 hectares of forest cover this study employs a qualitative conceptual research method, analyzing the Mining Law (UU Minerba), the Job Creation Law (UU Cipta Kerja), and the concept of sustainability. The study argues that the current legal framework for natural resource management has failed to uphold intergenerational justice, as evidenced by the regression in environmental protection under UU Minerba No. 2 of 2025 which expands mining concessions, weakens oversight mechanisms, and prioritizes short-term economic interests over ecological sustainability and UU Cipta Kerja, which reduces environmental permits to mere approvals and limits public participation in environmental impact assessments. From the perspective of siyasah syar'iyyah particularly the principles of maslahah (public welfare), 'adl (justice), and the prohibition of mafsadah (harm) and the Green Constitution framework rooted in Articles 28H(1) and 33(4) of the 1945 Constitution, the study finds that effective natural resource governance requires a paradigmatic shift from anthropocentric, short-term oriented constitutional interpretation toward a substantive constitutional approach that embeds precautionary principles, non-regression, and state trusteeship for future generations. The study proposes an integrative "Siyasah Ekologis" framework that harmonizes Islamic political ethics with green constitutionalism to ensure that natural resource exploitation does not sacrifice the rights of future generations for the sake of present economic gains
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