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While world leaders assemble in Brazil for Cop30, it is essential to assess our collective progress in cutting global greenhouse gas emissions.

Despite 30 years of UN climate summits, nearly 50% of the CO2 built up in the atmosphere since the Industrial Revolution has been released since 1990. Incidentally, 1990 marked the publication of the First Assessment Report by the IPCC, which confirmed the danger of human-caused global warming. As scientists prepare the upcoming IPCC report, they do so aware that their work remains eclipsed by political agendas. Regardless of well-intentioned efforts, the planet is remains dangerously off track to avert catastrophic climate change.

Record-Breaking CO₂ Levels and Carbon-Based Fuel Dependency

Recent data show that CO₂ concentrations reached a new peak of 423.9 parts per million in 2024, with the growth rate from the previous year jumping by the largest yearly increase since record-keeping started in 1957. According to the international carbon monitoring initiative, ninety percent of total global CO₂ emissions in last year came from burning fossil fuels, while the other tenth was due to land-use changes such as deforestation and forest fires.

While the increase in fossil CO₂ emissions in recent times was propelled by higher use of gas and oil—accounting for over half of global emissions—coal burning also reached a historic peak, making up forty-one percent. In spite of the previous climate summit's evaluation calling for nations to move beyond carbon fuels, collective plans still intend to produce more than double the quantity of fossil fuels in 2030 than aligns with limiting planet heating to 1.5C, with continued extraction of gas justified as a less polluting bridge fuel.

The Illusion of Eco-Friendly Measures

Rather than concentrating on financial motivators to accelerate the elimination of carbon fuels, environmental strategies are overly dependent on feelgood eco-positive approaches that seek to neutralize carbon emissions by afforestation rather than reducing industrial emissions. Although protecting, expanding, and restoring natural carbon sinks like forests and wetlands is beneficial in itself, research has demonstrated that there is not enough land to reach the global goal of net zero emissions using nature-based solutions by themselves.

Approximately 1 billion hectares—an area bigger than the USA—is needed to meet carbon neutrality commitments. More than forty percent of this area would need to be transformed from current applications like food production to carbon capture initiatives by 2060 at an never-before-seen pace.

Even if this regenerative utopia could be achieved, woodlands take time to mature and are susceptible to fires, so they cannot be considered as a fast or permanent carbon storage solution, especially in a rapidly shifting environment. While extreme heat and dryness engulf more of the planet, these sincere attempts could actually go up in smoke.

The Weakening of Planetary Absorbers

Research data indicates that about 50% of the total CO₂ emitted each year stays in the air, while the remainder is absorbed by seas and land ecosystems. With global heating, these environmental absorbers are becoming less effective at capturing CO₂, which means that additional CO2 accumulates in the air, intensifying climate change. Transferring the mitigation burden onto the agricultural and forest sectors simply relieves the fossil fuel industry from the urgency to cut pollution any time soon.

The Carbon Debt and Coming Populations

Achieving carbon neutrality by mid-century requires carbon dioxide removal (CDR), which at present relies almost exclusively on land-based measures to soak up excess carbon from the atmosphere. Emitting companies can easily purchase offsets to counterbalance their discharges and proceed with normal operations. Meanwhile, the planetary heat imbalance resulting from the combustion of hydrocarbons continues to further destabilise the global climate system. Essentially, we are adding more carbon debt to our global account, leaving future generations with an unpayable liability.

To curb the scale and duration of overshoot the global warming targets, the world eventually needs to surpass the neutralising effect of net zero and begin to drawdown cumulative historical emissions to achieve a carbon-negative state.

The Political Distortion of Net Zero

Based on the most recent data from the international carbon research group, plant-based carbon removal is presently absorbing the equal of about 5% of annual fossil carbon dioxide emissions, while engineered carbon extraction represents only about a tiny fraction of the CO2 emitted from carbon sources. More generous sector projections place it at around zero point one percent of total global emissions. At the risk of sounding like a heretic, the political distortion of net zero is a deceptive gap that distracts from the scientific imperative to eradicate the main source of our warming world—fossil fuels.

The Critical Requirement for Concrete Action

While this scientific reality should dominate talks at Cop30, past events indicates that polite incrementalism and deference to politics will prevail. Ambiguous promises of future ambition will continue to postpone the pressing requirement for definite short-term measures. Unless leaders are brave enough to put a price on carbon to bring the era of fossil fuels to a definitive end, we are releasing increasing amounts of CO2 to the atmosphere, compounding the environmental disaster currently happening across the globe.

The challenge we confront is straightforward: genuinely respond to the evidence-based situation of our predicament or suffer the consequences of this profound moral failure for centuries to come.