摘要: Criegee intermediates (CIs) ( 1 ) are the main in atmospheric reactions between ozone and organic molecules, resulting formation of free radicals, acids, carbonyl compounds, aerosols. Such contribute to local photochemical smog global climate change. Advances understanding chemistry CIs long remained elusive because these compounds could not be observed directly. On page 174 this issue, Su et al. 2 report direct detection a CI, on 177, Taatjes 3 describe CI kinetics data that yield key information about their impact atmosphere.