New Delhi: air-quality warning system cuts peak pollution Ghude, Sachin D. ; Kumar, Rajesh ; Govardhan, Gaurav ; Jena, Chinmay ; Nanjundiah, Ravi S. ; Rajeevan, M. Abstract Letter to the Editor Publication: Nature Pub Date: February 2022 DOI: 10.1038/d41586-022-00332-y Bibcode: 2022Natur.602S.211G