Tobacco smoking is the practice where tobacco is burned and the resulting smoke (consisting of particle and gaseous phases) is inhaled. The practice may have begun as early as 5000–3000 BC. Tobacco was introduced to Eurasia in the late 16th century where it followed common trade routes.
Nicotine patches work well for most regular smokers and can be worn round the clock (24 hour patches) or just during the time you are awake (16 hour patches), and they work by releasing nicotine directly into the bloodstream through the skin.
Although some forms of snuff can be used by sniffing or inhaling into the nose, most smokeless tobacco users place the product between their gum and cheek. Users suck or chew on the tobacco, and saliva can be spat out or swallowed. The tobacco industry has also developed newer smokeless tobacco products such as lozenges, tablets, tabs, strips, and sticks.
Three percent of American adults are smokeless tobacco users. They run the same risks of gum disease, heart disease, and addiction as cigarette users, but an even greater risk of oral cancer.
The popularity of hookah, also known as shisha and narghile, runs against the anti-tobacco trend, partly because it appeals to teens and young adults. Water pipes also are exempted from some smoke-free laws and enjoy a mystique of being a more cultural and safer alternative to cigarettes.
Hookah smoke contains toxicants not only from burning tobacco but also from the charcoal used to heat the tobacco in the pipe’s bowl, including CO, heavy metals, and polycyclic aromatic hydrocarbons. Shared hookahs also can raise the risk for communicable diseases.
Hookahs—sometimes called water pipes—are used to smoke specially made tobacco that is available in a variety of flavors (e.g., apple, mint, cherry, chocolate, coconut, licorice, cappuccino, and watermelon).Hookah smoking is typically practiced in groups, with the same mouthpiece passed from person to person.
A typical electronic cigarette contains a nicotine cartridge, a vaporiser, with electronic circuitry and sensors and a battery. Depending on the brand a cartridge may contain between 0-16mg of nicotine. The cartridge may contain additional chemicals, including propylene glycol, water and various flavourings.
Most cigars are composed primarily of a single type of tobacco (air-cured and fermented), and they have a tobacco wrapper. They can vary in size and shape and contain between 1 gram and 20 grams of tobacco. Three cigar sizes are sold in the United States:
Cigars, like cigarettes, contain nicotine, the substance that can lead to tobacco dependence. A single full-size cigar can contain as much nicotine as do several cigarettes. If you inhale cigar smoke, you can get as much nicotine as if you smoked cigarettes. And even if you don't inhale, large amounts of nicotine can be absorbed through the lining of your mouth. Smoking cigars instead of cigarettes doesn't reduce your risk of nicotine dependence...All tobacco smoke contains more than 60 chemicals that can cause cancer, and cigar smoke is no exception.
As the tobacco industry attempts to adapt to smoking bans, it is developing dozens of new ways for the body to absorb nicotine -- from hookahs to snus to lozenges to smokeless nicotine delivery systems...Public health and anti-tobacco experts are perplexed about all those new products. Some might be a safer alternative to cigarettes and could help smokers quit. On the other hand, they know almost nothing about how many carcinogens they harbor.