气候变化领域集成服务门户(CCPortal): Are e-scooters polluters? the environmental impacts of shared dockless electric scooters

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DOI	10.1088/1748-9326/ab2da8
	Are e-scooters polluters? the environmental impacts of shared dockless electric scooters
	Hollingsworth J.; Copeland B.; Johnson J.X.
发表日期	2019
ISSN	17489318
卷号	14 期号:8
英文摘要	Shared stand-up electric scooters are now offered in many cities as an option for short-term rental, and marketed for short-distance travel. Using life cycle assessment, we quantify the total environmental impacts of this mobility option associated with global warming, acidification, eutrophication, and respiratory impacts. We find that environmental burdens associated with charging the e-scooter are small relative to materials and manufacturing burdens of the e-scooters and the impacts associated with transporting the scooters to overnight charging stations. The results of a Monte Carlo analysis show an average value of life cycle global warming impacts of 202 g CO2-eq/passenger-mile, driven by materials and manufacturing (50%), followed by daily collection for charging (43% of impact). We illustrate the potential to reduce life cycle global warming impacts through improved scooter collection and charging approaches, including the use of fuel-efficient vehicles for collection (yielding 177 g CO2-eq/passenger-mile), limiting scooter collection to those with a low battery state of charge (164 g CO2-eq/passenger-mile), and reducing the driving distance per scooter for e-scooter collection and distribution (147 g CO2-eq/passenger-mile). The results prove to be highly sensitive to e-scooter lifetime; ensuring that the shared e-scooters are used for two years decreases the average life cycle emissions to 141 g CO2-eq/passenger-mile. Under our Base Case assumptions, we find that the life cycle greenhouse gas emissions associated with e-scooter use is higher in 65% of our Monte Carlo simulations than the suite of modes of transportation that are displaced. This likelihood drops to 35%-50% under our improved and efficient e-scooter collection processes and only 4% when we assume two-year e-scooter lifetimes. When e-scooter usage replaces average personal automobile travel, we nearly universally realize a net reduction in environmental impacts. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	electric scooter; environmental impacts; life cycle assessment; transportation
语种	英语
scopus关键词	Carbon dioxide; Charging (batteries); Electric vehicles; Eutrophication; Gas emissions; Global warming; Greenhouse gases; Intelligent systems; Life cycle; Manufacture; Monte Carlo methods; Transportation; Battery state of charge; Electric scooters; Environmental burdens; Fuel-efficient vehicles; Global warming impact; Life Cycle Assessment (LCA); Life-cycle greenhouse gas emissions; Monte carlo analysis; Environmental impact; electric vehicle; emission; environmental impact; global warming; greenhouse gas; life cycle analysis; Monte Carlo analysis; transportation
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154442
作者单位	Department of Civil, Construction and Environmental Engineering, North Carolina State University, United States
推荐引用方式 GB/T 7714	Hollingsworth J.,Copeland B.,Johnson J.X.. Are e-scooters polluters? the environmental impacts of shared dockless electric scooters[J],2019,14(8).
APA	Hollingsworth J.,Copeland B.,&Johnson J.X..(2019).Are e-scooters polluters? the environmental impacts of shared dockless electric scooters.Environmental Research Letters,14(8).
MLA	Hollingsworth J.,et al."Are e-scooters polluters? the environmental impacts of shared dockless electric scooters".Environmental Research Letters 14.8(2019).