The 'Stockholm+50' meeting, significant in environmental history, marked 50 years of which event?
A
Kyoto Protocol
B
1972 UN Conference on the Human Environment
C
Earth Summit 1992
D
Paris Agreement 2015
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Correct Answer 1972 UN Conference on the Human Environment
Explanation
Stockholm+50 marked 50 years since the 1972 United Nations Conference on the Human Environment, which was the first global conference on the environment.