Introduction: In the era of modern medicine. research is a fundamental tool to study the natural behaviour of diseases and evidence based management of patients. Excluding a few developed countries. research is still a neglected field. https://ozqntfrdimaw5q.timeblog.net/70688500/multivariate-urban-air-quality-assessment-of-indoor-and-outdoor-environments-at-chennai-metropolis-in-south-india