As climate commitments accelerate globally, businesses are under increasing pressure to reduce emissions and transition toward sustainable operations.
Two of the most widely used approaches are:
Green power (renewable energy)
Carbon offsets
While often used interchangeably, they serve distinct but complementary roles in a company’s decarbonization strategy.
Understanding how green power and carbon offsets work, and how to use them effectively, is critical for organizations aiming to achieve net-zero targets.
What is Green Power?
Green power refers to electricity generated from renewable sources such as Solar, Wind, Hydroelectric, and Geothermal.
Unlike fossil fuels, these sources generate energy with minimal or zero direct greenhouse gas emissions.
According to the International Energy Agency Renewables Report, renewable energy is rapidly expanding and is expected to dominate global power capacity additions in the coming years.
Why does Renewable Energy Matter?
The shift toward renewable energy has now become a necessity. Global food systems alone contribute approximately 30% of total greenhouse gas emissions, underscoring the urgency of decarbonizing energy systems that support these industries.
What Are Carbon Offsets?
Carbon offsets enable organizations to compensate for unavoidable greenhouse gas emissions by investing in projects that reduce or remove greenhouse gases elsewhere.
These include:
Reforestation (ARR projects)
Renewable energy projects
Methane capture
Clean cooking initiatives
Carbon offsets are traded as carbon credits across voluntary and compliance markets.
Renewable Energy Offsets vs Carbon Offsets
A common misconception is that renewable energy and carbon offsets are interchangeable. They are not.
Renewable Energy Offsets (RECs/I-RECs)
Electricity generated from renewable sources can generate Renewable Energy Certificates (RECs) or I-RECs, depending on the market and certification system. It represents:
1 MWh of electricity generated from renewable sources
These help companies reduce Scope 2 emissions and claim renewable energy usage.
Carbon Offsets (Carbon Credits)
Carbon credits represent:
1 metric ton of CO₂ equivalent (tCO₂e) reduced or removed
These are used to offset Scope 1, 2, and 3 emissions and neutralize unavoidable emissions
Key Difference
Aspect | RECs/Green Power | Carbon Offsets |
Representation | Renewable electricity | Emissions reduction/removal |
Scope | Scope 2 | Scope 1, 2, 3 |
Market | Energy attribute markets | Carbon markets |
Both are essential, but not substitutes.
Why RECs Are Not Carbon Credits?
Although renewable energy projects may generate both Renewable Energy Certificates (RECs/I-RECs) and carbon credits under certain circumstances, the two represent different environmental attributes and should not be used interchangeably.
RECs (or I-RECs) certify that 1 MWh of electricity was generated from a renewable energy source, allowing organizations to make renewable electricity claims and reduce their market-based Scope 2 emissions.
Carbon credits, on the other hand, represent 1 metric ton of CO₂ equivalent (tCO₂e) reduced, avoided, or removed through a verified climate project. They are used to compensate for residual emissions across Scope 1, Scope 2, and Scope 3.
In short, RECs support renewable electricity procurement, while carbon credits address greenhouse gas emissions. Both play distinct and complementary roles in a credible corporate decarbonization strategy.
Why Businesses Need Both
A credible decarbonization strategy includes:
Reducing emissions using renewable energy
Offsetting residual emissions using carbon credits
This approach aligns with the GHG Protocol Scope 3 Standard, which emphasizes measuring and reducing emissions across the entire value chain. For many organizations, Scope 3 emissions account for the largest share of their carbon footprint, often representing more than 70% of total emissions.
While renewable energy can significantly reduce Scope 2 emissions, addressing value chain emissions typically requires broader decarbonization efforts alongside high-quality carbon credits for residual emissions.
Global Momentum Toward Renewable Energy
The transition to renewable energy is accelerating globally.
At COP28, countries committed to tripling renewable energy capacity by 2030 to meet climate targets.
The IEA Net Zero Roadmap estimates that over 11,000 GW of renewable energy capacity will be required by 2030 to limit global warming to 1.5°C.
How Companies Can Adopt Renewable Energy
Transitioning to renewable energy requires a structured approach:
Step 1: Measure Emissions
Companies should first understand:
Current energy consumption
Scope 2 emissions
Carbon hotspots
Platforms like ECal enable organizations to do accurate emissions tracking.
Step 2: Procure Renewable Energy
Companies can source renewable electricity through:
On-site installations (solar, wind)
Power purchase agreements (PPAs)
Renewable energy certificates (RECs / I-RECs)
With Sustainiam’s Certificate Issuance Platform, CiP, organizations can:
Issue and manage I-RECs
Ensure transparency and compliance
Step 3: Offset Residual Emissions
Even after transitioning to renewable energy, some emissions remain unavoidable. This is where carbon markets play a key role. Using Sustainiam’s EmX, companies can:
Access verified carbon credits
Offset emissions efficiently
The World Bank Carbon Pricing Dashboard highlights the growing adoption of carbon pricing mechanisms globally.
Challenges in Renewable Energy Adoption
Despite strong momentum, there are still challenges that remain:
1. High Initial Investment
Renewable energy infrastructure often requires significant upfront investment.
2. Intermittency
Solar and wind depend on environmental conditions.
3. Regulatory Complexity
Policies vary across regions.
However, costs are declining rapidly. According to the IRENA Renewable Power Generation Costs Report, renewable energy costs have dropped significantly, making them increasingly competitive with fossil fuels.
Real-World Examples
Google has matched its annual electricity consumption with renewable energy purchases since 2017 through long-term Power Purchase Agreements (PPAs) and renewable energy certificates.
The company is now working toward operating on 24/7 carbon-free energy by 2030, demonstrating how renewable energy procurement can significantly reduce operational emissions.
Microsoft
Microsoft combines renewable electricity procurement with investments in high-quality carbon removal projects as part of its commitment to become carbon negative by 2030.
Its strategy reflects the widely accepted principle of reducing emissions first and addressing remaining emissions through carbon removal and other credible offset mechanisms.
How Green Power and Carbon Offsets Work Together
The most effective climate strategy integrates both:
Renewable energy to reduce ongoing emissions
Carbon offsets to neutralize remaining emissions
Together, they form the foundation of a credible net-zero pathway.
Conclusion
The transition toward green power and carbon offsets is no longer optional. It is now a strategic necessity. As climate regulations tighten and sustainability expectations rise, companies must adopt a dual approach:
Shift to renewable energy
Participate in carbon markets
Organizations that act early will not only reduce emissions but also gain a competitive advantage in a rapidly evolving market.
