Though I may start as a gas, in your lungs I will reside, where the cycle of life meets the tides of the tide.
Category: Science · Difficulty: expert
Hint: I’m a product of respiration, essential for plants.
Answer
Carbon gas
Explanation
Carbon dioxide is produced by respiration and used by plants in photosynthesis, completing the carbon cycle.
This is a expert science riddle — one of the harder riddles here. The answer is Carbon gas.
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