Environment & Ecology · Environment
जलवायु परिवर्तन पर संयुक्त राष्ट्र रूपरेखा अभिसमय (UNFCCC), जो शुरुआत में 50 से अधिक देशों द्वारा समर्थित था, किस तिथि से प्रभावी हुआ?
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- 116 फरवरी, 2005
- 211 दिसम्बर, 1997
- 31 जनवरी, 1995
- 421 मार्च, 1994✓
सही उत्तर देखें
21 मार्च, 1994
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