Emissions over Time
The GHG Protocol is designed to enable reporting entities to track and report consistent and comparable emissions data over time. The first step to tracking emissions over time is the establishment of a base year. A base year is a benchmark against which subsequent emissions can be compared to create meaningful comparisons over time and may be used for setting GHG reduction targets.
To comply with the GHG Protocol principles of relevance and consistency, a reporting entity is required to establish and report a base year for its Scope 1 and Scope 2 GHG emissions. A base year is only required for Scope 3 emissions when Scope 3 performance is tracked or a Scope 3 reduction target has been set. That is the case whether the entity is reporting under the Corporate Standard or the Scope 3 Standard (see below How to apply the Corporate Standard, Scope 2 Guidance and Scope 3 Standard?).
How to apply the Corporate Standard, Scope 2 Guidance and Scope 3 Standard? |
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An entity reporting under the Corporate Standard is not required to disclose Scope 3 emissions. As a result, there are three options under the GHG Protocol for reporting Scope 3 emissions, as described in the following table, which is based on Table 1.1 in the Scope 3 Standard: |
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Option |
Description |
Applicable GHG criteria |
1 |
A reporting entity reports its Scope 1 and Scope 2 GHG emissions and either (1) no Scope 3 emissions or (2) Scope 3 emissions from activities that are not aligned with any of the prescribed Scope 3 categories (the latter is very rare). |
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2 |
A reporting entity reports its Scope 1 and Scope 2 GHG emissions and some, but not all, relevant and material Scope 3 GHG emissions in accordance with the Scope 3 calculation guidance but not with the Scope 3 Standard. |
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3 |
A reporting entity reports its Scope 1 and Scope 2 GHG emissions and all relevant and material categories of Scope 3 GHG emissions |
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Consider this! |
The GHG Protocol encourages reporting entities to begin reporting GHG emissions information and improve the completeness and precision of that information over time. While the GHG Protocol requires a company to establish and report a base year for its Scope 1 and Scope 2 emissions, a reporting entity that recently started to report GHG emissions information and has not established an emissions reduction target may choose not to set a base year until the precision and completeness of their emissions inventory have improved. In this situation, the reporting entity should disclose that a base year has not yet been established and the reason for not establishing a base year. |