...
- Company attributes - name and location.
- Utility bills showing energy purchased.
- REC's showing renewable energy purchased and retired.
- Raw materials purchased - Dollar value, quantity, weight, and source. The raw material also has a published carbon footprint which the company could use.
- Products produced - Dollar value, quantity, and weight
- Carbon offsets
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Then we'll have a second company C2 with the same setup, but which purchases the products of C1. It will obtain the carbon neutrality certification for C1 and use it for its own carbon audit and carbon neutrality certification.