4. What would happen, if there were no green plants on earth?
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When green plants make food, they give off oxygen. This is a gas that all animals must breathe in order to stay alive. Without plants, animals would have no oxygen to breathe and would die. ... Without plants there would be no food to eat!
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When green plants make food, they give off oxygen. This is a gas that all animals must breathe in order to stay alive. Without plants, animals would have no oxygen to breathe and would die. ... Without plants there would be no food to eat!
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