INTRODUCTION
While Cigars are typically composed entirely of whole-leaf tobacco; cigarettes are distinguished from a cigar by their smaller size, use of processed leaf, and white paper wrapping.
A cigarette is a product consumed through smoking and manufactured out of cured and finely cut tobacco leaves and reconstituted tobacco, often combined with other additives, then rolled or stuffed into a paper-wrapped cylinder (generally less than 120 mm in length and 10 mm in diameter). The cigarette is ignited at one end and allowed to smoulder for the purpose of inhalation of its smoke from the other (usually filtered) end, which is inserted in the mouth. They are sometimes smoked with a cigarette holder. 

Approximately 5.65 trillion cigarettes are produced globally each year and are smoked by over 1.15 billion people or greater than one-sixth of the world population.

Smoking prevalence by gender