Session 5

Carbon Accounting

Summary

Session 5 explains the Carbon Accounting methodology: definitions of scope 1, 2 & 3, emissions factors and volumes of activity.

It develops the strategic interest of Carbon Accounting for companies, as it measures the physical flows and market conditions necessary for company operations.

Session 5 presents the Net Zero Initiative and differentiates CO2 emissions from Avoided Emissions and Captured CO2, and stresses the irrelevance of subtracting them from each other.

Course Outline

0:00
Key principles of Carbon Accounting
01:30
1:30
Break
00:15
1:45
Example: Washing Machine
00:30
2:15
Workshop: Cars Carbon Footprint
00:45

Key Learnings

3 Scopes

  1. Scope 1: direct emissions of company assets
  2. Scope 2: indirect emissions due to company energy consumption
  3. Scope 3: upstream and downstream indirect emissions

Definitions

  • Emission Sources: based on the scope.
  • Emissions Factors: CO2 emission by activity unit. Emissions factors are provided by public databases.
  • Activity Volume: number of units operated over a period of time.

Collecting a company's data can represent a significative time investment.

The 3 Scopes of Carbon Accounting

Greenhouses gas

  1. CO2: Fossil energies, Cement, Deforestation
  2. CH4: Leaks, Beef, Rice, Waste fermentation
  3. N2O: Agricultural
  4. Fluorinated gases: refrigerant system leaks

Estimated vs. Actual Emissions

  • Scopes 1 & 2: mandatory. Scope 3: not mandatory and no rules on scope 3 limits.
  • Few Greenwashing techniques:
  • Limit emission sources to scopes 1 & 2, outsource carbon intense activities to other companies.

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Basic Math

1. List: the emission sources by scope.

2. Multiply: the Emission Factor by the Activity Volume for each source.

3. Add: the emissions of all sources

Sector Predominance of Scope 3

Scope 3 represents the largest scope for most business activities.

Scope 3 over 90%: Banking, Retail, Software & Services, Real Estate.

Scopes 1+2 over 50%: Extraction, Passenger Transportation, Energy.

3 Actions for Companies

1. Reduce Internal Emissions: Induced emissions

2. Reduce Third-Party Emissions: Avoided emissions

3. Develop Carbon Sinks: Negative emissions

Subtracting Induced, Avoided and Negative emissions makes no physical sense.

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Student Projects

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Speaker

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Focus

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Pedagogical Note