“被动吸烟”常见的英语表达是 "passive smoking" 。例如:Passive smoking can also cause serious health problems.(被动吸烟也可能引发严重的健康问题。 )
此外,也可用 "secondhand smoking" 或 "involuntary smoking" 来表达类似意思,不过“passive smoking”使用更为普遍。