Plants require hydrogen, oxygen and carbon to grow. These nutrients are necessary for their photosynthesis to convert sunlight, carbon dioxide and water into sugars for their growth and development. If the environment was only offering oxygen, they would be lacking in two essential nutrients.
Nope. As mercurycommunicat… noted, plants need more than oxygen. To photosynthesize, plants need carbon dioxide (from the air) and water to produce sugar and oxygen.
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