3 reasons why smoking is bad. Explore in-depth reporting and video coverage on global tech giants, Silicon Valley, and innovative startups. Learn facts about vaping and why you should rethink taking it up. For those who have diabetes, smoking makes this disease even harder to control. While not directly related, smoking accompanied with other disorders like hepatitis C or B dramatically increases the risk in people with the same conditions who don’t smoke. Smoking is the number one cause of lung cancer. Sep 26, 2019 · If you need motivation to quit smoking this October then read our top 10 reasons why smoking is bad for your health: Cancer Smoking is responsible for 70% of all cases of lung cancer. . Discover the harmful effects of smoking on your lungs. Smoking causes high blood pressure, lowers your ability to exercise, and makes your blood more likely to clot. Smoking causes or increases your risk for many types of cancer.