Examining Vedic Yajna's Effects on the AQI of India in the Second Wave of the COVID-19 Pandemic: An Healthcare 4.0 Concept for Smart Cities 5.0. - Rohit Rastogi; Devendra K. Chaturvedi; Mukund K. Rastogi; Saransh Chauhan; Vaibhav Aggarwal; Utkarsh Agrawal; Richa Singh (Int. J. Inf. Syst. Soc. Chang., 2022)