As Delhi’s air quality plunges, a political war erupts between the Bharatiya Janata Party and the Aam Aadmi Party. Parvesh Verma blames 11 years of inaction, while Arvind Kejriwal calls the capital a “gas chamber”. In an exclusive interview, Manjinder Singh Sirsa outlines the government’s response, even as residents who moved out of Delhi describe pollution as a survival crisis, not just an environmental one.