Table 7 Emission factor parameters included in the sensitivity analysis.

Softwood production transport and size reduction

46.0

0.5

1.9

Range reflects the difference between high and low estimates for softwood emissions, excluding land-use change

kgCO₂e.odt^-1

Straw production and transport

2.6

0.5

2

This range is illustrative only and reflects variation around the lower estimate for straw

Enzyme production

kgCO₂e.kg protein^-1

9.55

0.1

1.4

Range reflects the carbon intensity of enzyme manufacture using Swedish or UK electricity relative to EU 27

Process electricity purchased

kgCO₂e.MWh^-1

340.8

0.1

1.4

Range reflects the carbon intensity of Swedish and UK electricity relative to EU 27

H₂SO₄^a

0.5

0.5

2

A range of -50% to +100% was considered sufficient

to cover uncertainties in production emissions

NaOH^b

0.58

SO₂^a

kgCO₂

0.641

e.kg^-1

(NH4)2PO4^c

1.67

MgSO₄^.7 H₂O^d

0.56