Gif of the Day: Smoker's Lungs vs. Non-Smoker's Lungs

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Gif of the Day: Smoker's Lungs vs. Non-Smoker's Lungs View Fullscreen
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Here is an amazing gif of two sets of lungs being filled with air. One pair was that of a smoker and the other was that of a non-smoker. Can you guess which is which?