Answer :

Final answer:

Expo '74 had the theme of the environment to address global environmental issues during a pivotal time in history.


Explanation:

Expo '74, a world's fair, had its theme as the environment. This theme was chosen during a time when international discussions were focusing on environmental issues and sustainability. At that time, events such as the UN Conference on the Human Environment in Stockholm in 1972 and the establishment of environmental principles were shaping global conversations.


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