Environment & Ecology · Environmental Engineering
भारत में, पर्यावरण (संरक्षण) अधिनियम, 1986 के तहत खतरनाक अपशिष्ट (प्रबंधन और संचालन) नियम पहली बार किस वर्ष अधिनियमित किए गए थे?
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1989
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