1992 mien Brazil ke shahar riyo …
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Preeti Dabral 3 years ago
यह 'एजेंडा 21' (1992) के बारे में था, रियो सम्मेलन उर्फ विश्व पृथ्वी शिखर सम्मेलन है, का उद्देश्य पृथ्वी की जैव विविधता की रक्षा के लिए था, एजेंडा 21 रियो डी जेनेरो, ब्राजील में आयोजित संधारणीय विकास के लिए संयुक्त राष्ट्र द्वारा एक गैर-बाध्यकारी कार्य योजना है।
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