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Scientific knowledge about everything advances on geometrical progression along the time. About smoking the main discovery is that on every inhalation thousands of dangerous substances are absorbed by the smoker organism, and that tens of diseases are progressively developed, being many types of cancer the worst of all.

They also discovered that the lungs of a ten years' smoker becomes very dark, and finally they reached to a conclusion that giving up smoking is a great option.

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12y ago

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