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The survey data was collected through the Behavioral Risk Factor Surveillance System, a national, cross-sectional survey performed annually by the U.S

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While it is common to hear people referring to words like AQI during weather reports, not everyone seems to understand what exactly these numbers imply for their health

3 / 13 When you stop smoking, nicotine withdrawal may give you headaches, affect your mood, or sap your energy

Causes and Risk Factors Most Common Cause: Cigarette smoking (primary) Other Risk Factors: Biomass fuel exposure Air pollution Occupational dust/fumes Recurrent lung infections Aging Genetic Cause: Alpha-1 Antitrypsin deficiency (early-onset emphysema, especially in non-smokers) Pathophysiology (Simplified) Smoking or irritants inflammation elastase and proteases Loss of elastic recoil and destruction of alveolar walls Enlarged airspaces gas exchange surface Air trapping hyperinflation Types of Emphysema (based on lobes affected) 1