The United Nations Conference on Environment and Development (UNCED) which adopted 'Agenda 21' was held at:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Rio de Janeiro.
Explanation:
The United Nations Conference on Environment and Development (UNCED), commonly known as the Earth Summit, was held in Rio de Janeiro, Brazil in 1992.
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At this landmark summit, the global community adopted Agenda 21, a comprehensive plan of action for sustainable development.
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The conference marked a major turning point in international environmental policy and cooperation.
Other Options Explained:
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Paris: Known for the Paris Agreement on climate change (2015), but not related to Agenda 21.
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Stockholm: Hosted the 1972 UN Conference on the Human Environment, the first major environmental conference, but not the one that adopted Agenda 21.
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New Delhi: While India has hosted various environmental and development conferences, it was not the venue for UNCED.