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smoke contains more than 4,000 chemicals. Besides nicotine, the most dangerous chemicals in cigarette smoke are tar and carbon monoxide. Tar causes lung cancer, emphysema, and bronchial diseases. Carbon monoxide causes heart problems; smokers are at high risk for heart disease. Smokers also have a dulled sense of smell and taste, reduced stamina for exercise and sports, and they smell of smoke. After smoking for a long time, smokers find that their skin ages faster and their teeth turn brown or discolored Each year, nearly half a million Americans die from tobacco use. One of every six deaths in the United States is a result of smoking tobacco, making tobacco more lethal than all other addictive drugs combined Nervous or Depressed? Scientists are learning how tobacco and nicotine affect teen smokers. Studies going on for 25 years show a link between heavy teen smoking and fear of going outside (agoraphobia). Teens who smoke were 6 times more likely to get agoraphobia
Decayed vascular tissue in cross-section of stem. Rust Rust colored pustules on leaves, latter black specks on Puccini helianthi stems. Sclerotinia head and stem rot Wilt soon after flowering. Light tan band around the stem at Verticillium dahliae soil level. Grey-black sclerotia (size of seed) in rotted heads and stems. Seed and meats discolored. Phoma black stem Large chocolate colored blotches on stems at maturity. Phoma macdonaldii H. Insects, Pollinators, and Birds: Bees are beneficial to sunflower yield because they carry pollen from plant to plant which results in cross pollination. Some sunflower varieties will not produce highest yields unless pollinators are present. All varieties will produce some sterile seed (without meats), but varieties differ in their degree of dependence on insect pollinators.