Table 2 The assumptions of the items used in the carbon footprint calculator [2]

From: Carbon footprint of private dental laboratories in Egypt: A cross-sectional study

Item

Assumptions

Staff travel

1→All staff traveled by petrol/diesel car*.

2→The size of cars was medium.

3→CFP of walking and cycling was zero.

Waste

1→Each waste bag weighed 6.72 kg.

2→CFP of recycling waste was zero.

3→Infectious waste was high-temperature incinerated.

Procurement

1→Emissions from procurement was assessed by the spend-based method. Every 1 Great Britain Pound (GBP) spent on dental materials and equipment was assumed to be equal to an average weighted conversion factor.

  1. *Patients were assumed to travel by petrol/diesel car, electric car, bus, train, motorbike, walking, or cycling. The lower rate of car ownership in Egypt compared to England ( < 10% versus 78%, respectively) [48, 49] prompted us to investigate the types of vehicles that the staff used to commute to work then apply the appropriate emission factor for each vehicle type from the patient travel emission factors.
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