This book discusses air pollution in Delhi from scientific, social and political perspectives. Using key debates and interventions on air pollution, it examines multiple forms and contested trajectories of environmental politics in Delhi and the National Capital Region, one of the most polluted areas in the world. It highlights the varied sciences of air pollution, administrative struggles, public activism, entrepreneurial solutions and synergies across interventions around it to link actionable science and urban citizenship. The book shows that an atmosphere of collaboration pervades advocacy, governance, and ecopreneurship in contemporary Delhi. Key features:    ·         Presents an original case study on urban environmentalism from the Global South ·         Cuts across science, policy, advocacy and innovation ·         Includes behind-the-scenes discussions, tensions and experimentations in the Indian air pollution space ·         Uses immersive ethnography to study a topical and relevant urban issue The book explores how governance of air is challenged by scales, jurisdictions and academic structures. It sheds light on how economic growth policies have long neglected their environmental consequences, leading to severe ecological destruction; ways in which toxic land, water, and air have made urban regions progressively unliveable; and the costs on the marginalised populations. As South Asian and Global South cities face several and fast intensifying environmental risks, this study presents a dialogue between urban environment and political ecology and science and technology studies on Delhi’s air. It also serves as a reminder of the enduring struggles over space, quality of life, and citizenship while pointing to the possibilities for different urban futures. The book will interest scholars and researchers of urban studies, urban geography, environmental studies, environmental politics, governance, public administration, sociology, and science and technology studies, especially in the Global South context. It will also be useful to practitioners, policymakers, bureaucrats, government bodies, civil society organizations, and those working on air pollution advocacy.