Guide to PAS 2050 How to assess the carbon ... - Aggie Horticulture
Guide to PAS 2050 How to assess the carbon ... - Aggie Horticulture
Guide to PAS 2050 How to assess the carbon ... - Aggie Horticulture
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48<br />
Appendix III: Product <strong>carbon</strong> footprint – worked example<br />
Input Amount Source<br />
Raw materials<br />
Wheat<br />
(1a) Farming<br />
kg CO 2<br />
e per <strong>to</strong>nne wheat 500 Emission fac<strong>to</strong>r database<br />
<strong>to</strong>nnes wheat per <strong>to</strong>nne croissants 0.9 Supplier interview<br />
kg CO 2<br />
e per <strong>to</strong>nne croissants 450 Calculation: emissions per <strong>to</strong>nne wheat × <strong>to</strong>nnes<br />
wheat per <strong>to</strong>nne croissants<br />
(1b) Transport<br />
Flour<br />
average distance (km) 100 Supplier interview<br />
kg CO 2<br />
e per km 1 Emission fac<strong>to</strong>r database; based on vehicle type<br />
kg CO 2<br />
e per outbound journey 100 Calculation: emissions per km × km per journey<br />
% empty on inbound journey 100% Supplier interview<br />
kg CO 2<br />
e per inbound journey 100 Calculation: % empty on return × emissions per<br />
km × km per journey<br />
kg CO 2<br />
e per <strong>to</strong>tal trip 200 Calculation: emissions outbound + emissions<br />
inbound<br />
<strong>to</strong>nnes wheat per trip 20 Supplier interview<br />
kg CO 2<br />
e per <strong>to</strong>nne wheat 10 Calculation: emissions per <strong>to</strong>tal trip/<strong>to</strong>nnes wheat<br />
per trip<br />
<strong>to</strong>nnes wheat per <strong>to</strong>nne croissants 0.9 Supplier interview<br />
kg CO 2<br />
e per <strong>to</strong>nne croissants 9 Calculation: emissions per <strong>to</strong>nne wheat × <strong>to</strong>nnes<br />
wheat per <strong>to</strong>nne croissants<br />
(2a) Production (milling)<br />
kWh per <strong>to</strong>nne wheat milled 100 Supplier interview<br />
kg CO 2<br />
e per kWh 0.5 Emission fac<strong>to</strong>r database; based on national grid<br />
<strong>to</strong>nnes wheat per <strong>to</strong>nne croissants 0.9 Supplier interview<br />
kg CO 2<br />
e per <strong>to</strong>nne croissants 45 Calculation: emissions per kWh × energy used<br />
per <strong>to</strong>nne wheat × <strong>to</strong>nnes wheat per <strong>to</strong>nne<br />
croissants<br />
(2b) Flour transport<br />
average distance (km) 100 Supplier interview<br />
kg CO 2<br />
e per km 1 Emission fac<strong>to</strong>r database; based on vehicle type
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