Dave Borlace cuts through the polite consensus of climate science to expose a dangerous dependency: the global strategy to limit warming relies less on stopping emissions and more on unproven, high-stakes technologies to scrub the atmosphere. While official reports frame carbon removal as a safety net, Borlace argues it is the central pillar of our survival plan, a gamble that could collapse if the underlying physics or geopolitics fail. This is not a discussion about future possibilities; it is an urgent audit of the fragile mechanisms the world is banking on to reverse centuries of industrial pollution.
The Methane Blind Spot
Borlace begins by highlighting a critical omission in the Intergovernmental Panel on Climate Change (IPCC) data regarding the Arctic. He notes that while the report acknowledges rapid warming, it fails to account for the accelerating feedback loop of permafrost melt. "What they don't mention in that passage and some would say this is almost willfully negligent on their part is that the rate of permafrost melt is accelerating rapidly and that melting is releasing huge quantities of methane," Borlace writes. This omission is significant because current climate models, which guide policy, do not include this potential "extra burst of methane" that could arrive in the mid-21st century. The argument here is that the baseline data is already optimistic, potentially rendering the targets set for 2030 and 2050 unachievable even if all current pledges are met.
Critics might argue that excluding highly uncertain feedback loops is standard scientific caution, but Borlace's point stands: relying on models that ignore accelerating natural emissions is a strategic error. If the Arctic releases a sudden surge of greenhouse gases, the entire mathematical framework for limiting warming to 1.5 or 2 degrees Celsius could shatter.
The Land Trap
With the baseline looking shaky, the focus shifts to the IPCC's primary solution: Carbon Dioxide Removal (CDR). Borlace dissects the reliance on afforestation and reforestation, noting that the report envisions planting trees on an area "about two-thirds the size of Australia." He explains that while this could sequester 3.7 billion tons of carbon annually, the permanence of this solution is illusory. "Capturing co2 in this way is not as permanent a solution as reducing emissions from fossil fuels in the first place," Borlace writes. He illustrates the fragility of this approach by pointing out that a forest fire or a "malevolent regime" burning the trees would instantly return that carbon to the atmosphere.
Furthermore, Borlace highlights the saturation issue, where forests eventually stop absorbing carbon, contrasting it with geological storage which lasts for millennia. The core of his argument is that planting trees is a temporary buffer, not a permanent fix, and it competes with food production and biodiversity. "If we over plant new trees on grassland ecosystems or diversified agricultural landscapes then we may get negative impacts on biodiversity and water resources," he warns. This framing is effective because it moves the conversation from "trees are good" to "where do we actually put them without breaking the food system?"
Capturing co2 in this way is not as permanent a solution as reducing emissions from fossil fuels in the first place.
The Energy Paradox of Direct Air Capture
Moving to technology, Borlace examines Direct Air Capture (DAC), a method that uses chemical processes to suck CO2 from the ambient air. He acknowledges the appeal of this technology being "independent of source and timing of emissions," but quickly dismantles the feasibility of scaling it. The energy cost is prohibitive: capturing one ton of CO2 requires up to 12.9 gigajoules of energy. Borlace points out the irony that "you're going to need an entire power station sized supply to make this work at scale," and that power must be renewable, or the process creates more emissions than it removes.
He uses the example of Climeworks, a company aiming to capture 1% of global emissions by 2025, to illustrate the sheer scale required. "That's the same number of shipping containers that comes out of Shanghai Harbor in two weeks," Borlace notes, emphasizing that while the engineering is possible, the logistical and energy footprint is staggering. The argument here is that DAC is not a silver bullet but a massive energy sink that diverts renewable power from decarbonizing the grid.
The Geoengineering Gamble
The commentary takes its most provocative turn when addressing Solar Radiation Modification (SRM), specifically stratospheric aerosol injection. Borlace explains that this technique mimics volcanic eruptions, like Mount Pinatubo, which cooled the planet by reflecting sunlight. The proposal involves "taking a fleet of say a few hundred jumbo jets and flying them around the world once or twice a year releasing sulfur dioxide into the atmosphere." Borlace bluntly states the implication: "we could keep spewing carbon dioxide into our atmosphere and as long as we were also spewing sulfur dioxide into the atmosphere in sufficient quantity then the two actions would cancel each other out."
However, he immediately flags the catastrophic side effects, including acid rain and the destruction of the ozone layer. "The real risk of mass sulfur dioxide dispersion is that it may well result in catastrophic air pollution and will almost certainly cause acid rain as well as this it's got the inconvenient side-effect of destroying the ozone layer," Borlace writes. He frames SRM not as a solution, but as a "lesser of two evils" reserved for a scenario where humanity has "absolutely run out of any other ideas." This is a crucial distinction: the technology exists, but the governance does not. The report suggests that international bodies like the UN Convention on Biological Diversity currently view such activities as a moratorium, yet the temptation to deploy them in a crisis remains.
Critics might argue that dismissing SRM entirely leaves us without a backup plan for runaway warming, but Borlace's caution is well-founded. The geopolitical risks of one nation unilaterally dimming the sun are immense, and the environmental side effects are poorly understood.
Bottom Line
Dave Borlace's analysis serves as a necessary reality check, revealing that the world's climate strategy is dangerously dependent on technologies that are either unproven at scale or fraught with existential risk. The strongest part of his argument is the exposure of the "methane blind spot," which suggests our current models are already too optimistic. His biggest vulnerability is the lack of a clear, immediate alternative to these high-tech fixes, leaving the reader with a sobering conclusion: the only reliable path forward is the one we are failing to take—drastically cutting emissions now. The upcoming COP24 conference will be the true test of whether leaders recognize that carbon removal is a desperate measure, not a policy strategy.