Environmental constitutionalism has emerged as one of the most influential developments in modern public law, particularly in jurisdictions where courts have played an active role in expanding constitutional rights. In India, environmental protection has been significantly shaped by judicial interpretation of constitutional provisions rather than by explicit constitutional text guaranteeing environmental rights. The Indian Supreme Court and High Courts have developed an extensive body of jurisprudence recognizing environmental protection as part of the fundamental right to life under Article 21 of the Constitution. Through innovative doctrines such as the polluter pays principle, precautionary principle, public trust doctrine, and sustainable development, the judiciary has transformed environmental governance into a rights-based constitutional framework. However, despite these advances, environmental governance in India continues to face structural challenges including regulatory fragmentation, enforcement deficits, and tensions between economic development and ecological sustainability. This paper examines the evolution of environmental constitutionalism in India by analyzing the constitutional framework, judicial innovations, and institutional mechanisms developed through case law. It also evaluates governance challenges that limit the effectiveness of environmental constitutionalism and explores potential pathways for strengthening ecological protection in the future. The paper argues that while judicial activism has played a critical role in developing environmental rights, sustainable environmental governance requires stronger institutional coordination, legislative clarity, and participatory governance mechanisms