Physics · Environmental Science
भारत में, पर्यावरण (संरक्षण) अधिनियम के तहत पहला व्यापक खतरनाक अपशिष्ट (प्रबंधन और संचालन) नियम किस वर्ष तैयार और अधिनियमित किया गया था?
- 11988
- 21991
- 31990
- 41989✓
सही उत्तर देखें
1989
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