Tian-Gui Cai2 articles listing Tian-Gui Cai in PNAS, indexed by Paperzzz from Crossref and OSF.Discarded cigarette butts as overlooked reservoirs and amplifiers of antibiotic resistance genes and pathogens in urban green spaces PNASNano-biochar regulates phage–host interactions, reducing antibiotic resistance genes in vermicomposting systems PNAS