Only a small fraction of the forest-based carbon credits that companies and governments have purchased to offset their greenhouse gas emissions actually help prevent deforestation, according to new research.
Only a small fraction of the forest-based carbon credits that companies and governments have purchased to offset their greenhouse gas emissions actually help prevent deforestation, according to new research.
Across nearly a score of UN-backed offset projects examined in central Africa, South America and Southeast Asia, only 5.4 million out of 89 million credits—about six percent—actually resulted in carbon reduction through forest preservation, scientists reported this week in the journal Science.
In carbon markets, a single credit represents one ton of CO2 that is either removed from the atmosphere by growing trees, or prevented from entering it through avoided deforestation.
Each year, burning fossil fuels—and, to a much lesser extent, deforestation—emit roughly 40 billion tons of CO2, the main driver of global warming.
As climate change accelerates and pressure mounts on corporations and countries to slash emissions, the market for carbon credits has exploded.
In 2021, more than 150 million credits valued at $1.3 billion originated in the so-called voluntary carbon market under a system forged within the UN’s climate change negotiating forum: REDD+, or Reduced Emissions from Deforestation and Forest Degradation in Developing Countries.
For more than a decade, however, such schemes have been dogged by charges of lack of transparency, dodgy accounting practices, and in-built conflicts of interest.
