Abstract
Reducing disposable plastic products has been in the spotlight lately, in order to address plastic pollution. With the rapid development of air transportation, plastic waste during flight is increasing, and most of it comes from catering. To evaluate the feasibility of replacing disposable plastic tableware, we carried out an integrated analytic hierarchy process (AHP) - life cycle assessment (LCA) study. The results show no significant feasibility in replacing salad bowls, while cutleries made of stainless steel, bamboo or bio-based plastic are preferred to petroleum-based plastic ones. In particular, bio-based plastic cutlery poses the least negative environmental impacts among all the disposable alternatives. Stainless steel cutlery will have the least carbon emissions when used more than 29 times. Replacing cutleries can reduce carbon emission by 12.5 g to 25.6 g of CO2 per cutlery set, leading to a maximum reduction of 10,219.51 t/a in China's domestic flights in 2019.
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