People without Plants

Biology

When a person goes into the rainforest or the ocean, that person can readily notice that the rainforest and the ocean are teeming with life. An observer of these places will also notice how every form of life works together to sustain the environment. Though human beings build artificial environments such as cities, humans are a part of the ecosystem on Earth, and they participate in this co-dependency on other forms of life to survive as well as to sustain the environment. A form of life that humans are dependent on are plants. Without plants, human beings would have no air to breathe and their respiratory systems would fail. There would exist no human civilizations without oxygen. Perhaps there would be other forms of life in the place of humanity that breathed another gas, but humanity would not exist as we know it today were it...
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