Covering 1.62 million square kilometres (more than 625,000 square miles), the forests of central Africa represent the planet's second-largest carbon sink after the Amazon.
They are also home to huge biodiversity including forest elephants and gorillas, but they face threats such as poaching, deforestation, and illegal logging.
At the opening of the three-day regional summit in Kinshasa, several speakers stressed that the needs of people living near the forest must be taken into account.
"For marginalised and poor populations, the forest is their supermarket," said Congolese agriculture minister Jose Mpanda.
"We're not going to forbid them to find something to eat".
Million Belay, the general coordinator of the NGO Alliance for Food Sovereignty in Africa, likewise told delegates that ensuring food security was crucial to protecting the forest.
"People will destroy the forest in search of food," he said. "There is a lot of support for conservation in the Congo Basin but there is very little support for the food system for the people."
The Democratic Republic of Congo, home to 60 percent of the vast Congo Basin rainforest, is one of the world's poorest countries.
Kinshasa has faced criticism for launching an auction last year for oil and gas blocks, some of which are in sensitive forest areas.
Voluntary deforestation carbon credits failing: study
Paris (AFP) Aug 29, 2023 - Only a small fraction of private sector forest-based carbon credits available for purchase to offset greenhouse gas emissions actually help prevent deforestation, according to new research.
Across nearly a score of 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 tonne 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 tonnes 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 the banner of REDD+, or Reduced Emissions from Deforestation and Forest Degradation in Developing Countries.
Such schemes, however, have long been dogged by charges of poor transparency, dodgy accounting practices, and in-built conflicts of interest.
As wildfires spread across regions that include forests supporting carbon credit schemes, permanence has also become a concern.
Earlier this year Zimbabwe sent a shudder through the private forest-based offsets market by announcing it would appropriate half of all the revenue generated from offsets on its land, exposing yet another vulnerability.
The projects under scrutiny in the new study are distinct from a parallel forest-based offsets programme backed by the United Nations, also known as REDD+, and carried out through bi-lateral agreements and multilateral lending institutions.
"Carbon credits provide major polluters with some semblance of climate credentials," said senior author Andreas Kontoleon, a professor in the University of Cambridge's department of land economy.
- 'Selling hot air' -
"Yet we can see that claims of saving vast swathes of forest from the chainsaw to balance emissions are overblown."
"These carbon credits are essentially predicting whether someone will chop down a tree and selling that prediction," he added in a statement. "If you exaggerate or get it wrong -- intentionally or not -- you are selling hot air."
Over-estimations of forest preservation have allowed the number of private sector carbon credits on the market to keep rising, which suppresses prices.
As of late July, the most competitive nature-based carbon credits sold at about $2.5 per tonne of CO2, down from an average of $9.5 in 2022, according to S&P Global Commodity Insights.
The new study is among the first peer-reviewed assessments across a number of representative projects.
Kontoleon and his team looked at 18 private sector REDD+ projects in Peru, Colombia, Cambodia, Tanzania and the Democratic Republic of Congo.
To assess their performance, the researchers identified parallel sites within each region with similar conditions but without forest protection schemes.
"We used real-world comparison sites to show what each REDD+ forest project would most probably look like now," said lead author Thales West, a researcher at VU University Amsterdam.
Of the 18 projects, 16 claimed to have avoided far more deforestation than took place at the comparison sites.
Of the 89 million carbon credits expected to be generated by all 18 projects in 2020, 60 million would have barely reduced deforestation, if at all, the study found.
There are several possible reasons that REDD+ schemes have fallen so far short of their carbon sequestration claims.
One is that they are calculated on the basis of historical trends that can be inaccurate or deliberately inflated.
The operation must also project deforestation or afforestation rates over an extended period of time, which is difficult.
In addition, projects may be located in areas where substantial conservation would have occurred in any case.
Most problematic, perhaps, is the ever-present incentive to exaggerate, the researcher said.
"There are perverse incentives to generate huge numbers of carbon credits, and at the moment the market is essentially unregulated," said Kontoleon.
"The industry needs to work on closing loopholes that might allow bad faith actors to exploit offset markets."
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