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Assessing the implications on air pollution of an alternative control-based criterion

Lin et al. (1) measure pollution embodied in Chinese–US international trade using an atmospheric chemical transport model and find that moving manufacturing offshore to China had an overall beneficial effect on public health in the United States but at the expense of air quality over the western region of the United States and air quality in Chinese regions. The promising line of research introduced by ref. 1 requires, in our view, a more detailed evaluation of established assumptions on emissions embodied in trade.