Carbon Credits: Overview & Voluntary Markets

Understanding voluntary carbon markets, carbon credits, and how organizations use them to achieve net-zero targets.

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Overview

Carbon credits represent a fundamental mechanism in the global effort to mitigate climate change. A carbon credit represents the right to emit one tonne of carbon dioxide equivalent (tCO2e), allowing organizations to offset their emissions by investing in projects that reduce or remove greenhouse gases elsewhere.

Voluntary Carbon Markets

The Voluntary Carbon Market (VCM) operates independently from compliance-driven carbon markets. Companies and individuals purchase carbon credits voluntarily to:

Achieve net-zero commitments
Demonstrate climate leadership
Meet stakeholder expectations
Support sustainable development projects

Types of Carbon Credits

Avoidance Credits

Credits earned by preventing emissions from occurring in the first place. Examples include:

Renewable energy projects
Forest preservation
Methane capture

Removal Credits

Credits earned by actively removing CO2 from the atmosphere:

Direct air capture
Bioenergy with carbon capture and storage (BECCS)
Enhanced weathering
Afforestation and reforestation

Key Concepts

Verification Standards

Carbon credits must meet verified standards to ensure legitimacy:

Verra (VCS): Largest voluntary carbon standard
Gold Standard: Focuses on sustainable development co-benefits
American Carbon Registry (ACR): US-based registry
Climate Action Reserve (CAR): US-focused standard

Additionality

A crucial concept meaning the carbon project would not have occurred without carbon credit financing. Projects must demonstrate additionality to be valid.

Permanence

The obligation that carbon reductions/removals remain permanent. Projects must have safeguards against reversal through fire, disease, or other risks.

Practical Guidance

Steps to Purchase Carbon Credits

Define your scope: Calculate your organizational carbon footprint (Scope 1, 2, and 3 emissions)
Set targets: Determine emission reduction goals and timeline
Select a standard: Choose appropriate verification standards
Evaluate projects: Consider project type, location, co-benefits
Verify retirement: Ensure credits are retired in your name
Report transparently: Disclose your carbon credit purchases

Common Mistakes to Avoid

Purchasing low-quality credits without proper verification
Using carbon credits as a substitute for emission reductions
Failing to retire credits (double-counting risk)
Not considering permanence risks

Examples

Microsoft Carbon Negative: Microsoft has purchased carbon removal credits from direct air capture and bioenergy with carbon capture projects to offset their operational emissions.

Stripe: The technology company has been a major buyer of high-quality carbon removal credits, investing in direct air capture and other innovative removal technologies.