Air pollution is a critical global issue with severe consequences for human health and the environment. According to the World Health Organization (WHO), air pollution results in approximately 2.4 million deaths annually. By 2018, 91% of the global population lived in areas where air pollution levels exceeded safety thresholds, with 2020 recording six million deaths attributed to both indoor and outdoor air pollution. In India, cities such as Delhi, Mumbai, and Bengaluru face some of the highest health impacts from air pollution, which significantly affects respiratory health.

Air pollutants are substances that can harm humans, animals, vegetation, or materials. The primary route of human exposure to these pollutants is through inhalation, though ingestion and skin contact can also contribute. Pollutants like particulate matter (PM), nitrogen dioxide (NO2), sulfur dioxide (SO2), and carbon monoxide (CO) can enter the bloodstream via the gastrointestinal and respiratory tracts, impacting various organs and leading to health problems. Short-term effects of air pollution include eye irritation, coughing, headaches, and fatigue, while long-term exposure can cause chronic respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD), cardiovascular disorders, and an increased risk of cancer. Specifically, PM2.5, with particles smaller than 2.5 micrometers, poses significant health risks as these particles can penetrate deep into the lungs and even enter the bloodstream.

The impact of air pollution extends to various body systems:

• Respiratory System: Pollutants can lead to chronic cough, wheezing, and exacerbation of conditions like asthma and COPD. Studies indicate that high levels of PM10 and NO2 exposure are linked to increased asthma risk and other respiratory issues.
• Cardiovascular System: Exposure to pollutants such as PM2.5 and NO2 is associated with progression in coronary artery disease, atherosclerosis, and hypertension, leading to potential heart disease.
• Endocrine System: Prolonged exposure to particulate matter and NO2 is linked to a higher risk of developing diabetes.
• Urinary System: Pollutants can affect kidney function, increasing the risk of chronic kidney disease and impairing glomerular filtration rate.
• Immune System: Increased air pollution exposure is associated with a higher risk of cancer, potentially due to defects in DNA repair mechanisms.

The pathophysiology of air pollution involves oxidative stress, where pollutants generate reactive oxygen and nitrogen species (ROS/RNS) that cause cellular damage, inflammation, and systemic effects throughout the body. Macrophages, part of the immune system, may release inflammatory markers, leading to further health issues.

Traffic police personnel, who spend extensive periods managing road traffic in urban areas, are particularly at risk due to continuous exposure to vehicular emissions. This exposure contributes to a higher prevalence of respiratory symptoms like cough, phlegm, and rhinitis compared to the general population. Despite this, there is a lack of localized studies, particularly in areas like East Sikkim, to assess the specific impact on traffic police personnel.

The proposed research aims to evaluate the respiratory health of urban traffic police personnel in East Sikkim using a cross-sectional study design. The study will utilize tools such as the ATS-DLD questionnaire to assess respiratory symptoms and a peak flow meter to measure peak expiratory flow rate (PEFR). This study will gather data on respiratory health status, analyze the impact of air pollution on traffic police, and provide insights into necessary preventive measures and interventions.