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A closed ecosystem made by humans is called…

User Krrish
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Answer:

An Ecosphere- according to the internet

User Valy Dia
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Answer: A closed ecological system for an entire planet is called an ecosphere.

Explanation: A closed ecological system for an entire planet is called an ecosphere. Man-made closed ecological systems which were created to sustain human life include Biosphere 2, MELiSSA, and the BIOS-1, BIOS-2, and BIOS-3 projects.