- Direct: on-site combustion of fuels, eg boilers, business travel, company-owned vehicles.
- Indirect: off-site combustion of fuels (for use on-site), eg procured resources: electricity, materials and employee commute.
- Process: on-site emission caused by processes.
- Energy Export: on-site combustion of fuels for use off site.
- Upstream: emissions caused by suppliers.
- Downstream: emissions created by an organisation's products/activities during their lifecycle.
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