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Puffing on a pack of cigarettes a day will leave your lungs black and riddled with cancer.

Nurse Amanda Eller, from North Carolina, shared the video showing one set of healthy lungs next to the diseased organs from a smoker.

The contrast is shocking.

On one side, a pair of bright red, healthy lungs — taken from someone who has never smoked before.

Next to the prime specimen, a grossly bigger set of lungs, that are black and almost resemble a pile of charcoal.