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Science Magazine – September 8, 2023: Reducing single-use cutlery with green nudges: Evidence from China’s food-delivery industry; Anatomy of a volcanic eruption undersea, and more…

Anatomy of a volcanic eruption undersea

Submarine flows from the Hunga Tonga–Hunga Ha‘apai eruption decimated seafloor cables

In December 2021, an undersea volcano in the southern Pacific Ocean, the Hunga Tonga–Hunga Ha‘apai (hereafter called the Hunga volcano) began erupting. In January 2022 the eruption reached a powerful climax, triggering atmospheric waves that traveled around the globe and a tsunami that swept across the Pacific Ocean. An estimated 75% of Earth’s volcanoes are underwater, and 20% of all fatalities caused by volcanic eruptions since 1600 CE have been associated with underwater volcanism (3).

Reducing single-use cutlery with green nudges: Evidence from China’s food-delivery industry

China’s high demand for online food delivery resulted in an increase in the use of disposable, single-use cutlery. Disposable cutlery increases plastic pollution, and paper napkins and wooden chopsticks contribute to environmental degradation that endangers wildlife and marine species and compromises human health. Informed by the literature on “green nudges, ” which are prompts to promote environmentally friendly behaviors, He et al. collaborated with Alibaba to use its mobile food delivery platform, Eleme, in a longitudinal field study across China.