Normal lungs are a healthy pink color; when they filter smoke they turn black, and the resulting tissue damage can lead to tumors and other serious lung disease. Smoking also affects the cardiovascular system, possibly leading to atherosclerosis, heart attacks, and strokes. If you don't smoke, don't start. If you do smoke, it's never too late to quit.
"Normal lungs are a healthy pink color; when they filter smoke they turn black, and the resulting tissue damage can lead to tumors and other serious lung disease. Smoking also affects the cardiovascular system, possibly leading to atherosclerosis, heart attacks, and strokes. If you don't smoke, don't start. If you do smoke, it's never too late to quit."@en
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