Compensate, Replace, or Reduce: The Dilemma of a Carbon-Free Future
By Samuel Herrera, Carbon Free Aviation Journalist
The debate on how to move toward a carbon-free future is intensifying in 2025, with growing and stricter research and scrutiny on the financial tools that supposedly help mitigate climate change.
Carbon Offsets and Renewable Energy Certificates (RECs)
For years, these two options have been presented as complementary paths for companies and consumers seeking to reduce their climate footprint.
However, recent research questions their actual effectiveness and places investors in front of a dilemma: should they compensate emissions, replace energy sources, or directly bet on reduction?
The Promise and Reality of Carbon Offsets
Carbon offsets, designed to capture or avoid emissions equivalent to one ton of CO₂, have been one of the most popular instruments in the voluntary market.
In theory, paying for offsets should balance the emissions of a flight, industrial production, or energy consumption. In practice, the picture is much more concerning.
A study published in Science in 2023 found that about 94% of the forest credits analyzed under REDD+ projects did not represent real emission reductions but inflated estimates of climate impact1.
Independent investigations reached similar conclusions, revealing structural flaws in how these offsets are calculated and certified.
More recently, the report Built to Fail? by Corporate Accountability (2025) evaluated 43 of the largest carbon credit projects in the voluntary market and concluded that more than 80% of the retired credits had a low probability of delivering the promised reductions2.
In short: most offset credits may not be providing real climate benefits.
These revelations have led many environmental organizations to publicly denounce that reliance on offsets diverts attention away from direct emissions reductions—a moral hazard that could compromise global climate goals.
RECs: A Limited Tool, but More Legitimate
In contrast, Renewable Energy Certificates (RECs)—which represent the generation of one megawatt-hour of renewable electricity—maintain greater legitimacy.
The global REC market was valued between $20 and $24 billion in 2024, with growth projections that could push it to $100 billion by 2034.
Furthermore, corporate demand has driven voluntary purchases to surpass even government requirements.
However, RECs are not free from criticism. Detractors argue that certificates allow companies to claim renewable consumption while still heavily relying on fossil fuels.
In other words, RECs can be effective in financing projects but are also prone to so-called “greenwashing.”
The key question for decision-makers is how to balance these tools in a context of growing public and regulatory distrust.
While RECs offer a more transparent path toward financing renewable projects, carbon offsets face a credibility problem that cannot be ignored.
Organizations like Carbone4 warn that more than 90% of credits under Verra’s REDD+ schemes could be classified as “phantom credits” 3 — credits with no real impact.
Given this scenario, more cautious investors are beginning to prioritize direct emissions reductions, combined with the strategic use of RECs as a transitional measure.
The Path Is Still Forward
Current recommendations are clear: skepticism toward offsets, prioritization of direct emissions reductions, and cautious use of RECs as a support tool.
For business leaders, this means not just buying credits but also demonstrating, with transparency, how those investments translate into real and verifiable CO₂ reductions.
In its report Built to Fail?, Corporate Accountability states: “Climate action must not fail. There must be absolute certainty that the solutions posed to solve the most pressing global crisis are guaranteed to work at the scale and in the timeframe needed.”
That demand for certainty is perhaps the greatest lesson for investors and executives in 2025: a carbon-free future depends less on inflated promises or phantom credits, and more on firm decisions of reduction, replacement, and transparency.