Table 2.

Emission factor of single-use surgical and EFL reusable face mask over 1 with the number of days for a reusable face mask to breakeven with the single-use face mask.

Impact Category	Abbr	Units	Single-use surgical face mask	EFL reusable face mask	Breakeven
Climate change	CC	kg CO2-eq	0.580	0.338	17 days
Fossil fuel depletion	FD	kg oil-eq	0.308	0.083	8 days
Metal depletion	MD	kg Fe-eq	0.045	0.019	13 days
Water depletion	WD	m3 Water eq	0.006	0.116	595 days
Freshwater ecotoxicity	FET	kg 1,4-DCB-eq	0.033	0.022	20 days
Freshwater eutrophication	FE	kg P-eq	−0.00012	0.00013	2 N.A
Marine ecotoxicity	MET	kg 1,4-DB-eq	0.029	0.014	15 days
Marine eutrophication	ME	kg N-eq	0.0001	0.0009	221 days
Human toxicity	HT	kg 1,4-DCB-eq	0.034	0.098	86 days
1Waste Generated	W1	kg	0.004	0.0004	3 days

Notes: 1: Waste generated excludes the waste generated from raw material production. 2: Compared with negative value EFL reusable face mask will never breakeven.