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As global leaders gather in the Brazilian Amazon for the 30th UN Climate Change Conference, it is essential to review our collective progress in cutting global greenhouse gas emissions.

In spite of three decades of UN climate summits, approximately half of the carbon dioxide accumulated in the atmosphere since the Industrial Revolution has been released after the year 1990. Coincidentally, 1990 was the publication of the First Assessment Report by the Intergovernmental Panel on Climate Change, which confirmed the threat of human-caused global warming. As scientists prepare the Seventh Assessment Report, they do so aware that scientific findings remains eclipsed by political influences. Regardless of sincere attempts, the world is remains far from the path to avert dangerous global warming.

Unprecedented CO₂ Levels and Fossil Fuel Dependency

Recent data indicate that atmospheric carbon dioxide levels reached a new peak of 423.9 ppm in the year 2024, with the increase rate from 2023 to 2024 surging by the largest yearly increase since modern measurements began in the late 1950s. Based on the Global Carbon Project, ninety percent of worldwide carbon dioxide output in 2024 originated from the combustion of carbon-based energy sources, while the other tenth was due to land-use changes such as deforestation and wildfires.

While the increase in carbon emissions from fuels in 2024 was propelled by increased use of gas and oil—accounting for over half of worldwide discharges—coal burning also reached a historic peak, making up 41%. Despite the previous climate summit's evaluation calling for nations to transition away from fossil fuels, global strategies still intend to extract over twice the amount of hydrocarbons in the year 2030 than is consistent with keeping planet heating to 1.5 degrees Celsius, with continued extraction of gas justified as a less polluting bridge fuel.

The Mirage of Nature-Based Solutions

Instead of focusing on financial motivators to speed up the phase-out of carbon fuels, environmental strategies are heavily reliant on feel-good nature positive approaches that aim to neutralize carbon emissions by afforestation rather than reducing factory discharges. Although conserving, enlarging, and rehabilitating ecological absorbers like woodlands and marshes is beneficial in itself, research has shown that there is insufficient territory to achieve the worldwide target of carbon neutrality using ecological methods alone.

Roughly 1 billion hectares—an area larger than the USA—is needed to meet carbon neutrality commitments. Over 40% of this area would need to be transformed from existing uses like agriculture to carbon capture initiatives by the year 2060 at an unprecedented rate.

Even if this regenerative utopia could be realized, woodlands require years to grow and can burn down, so they cannot be considered as a fast or lasting CO2 retention method, particularly in a rapidly shifting environment. While severe temperatures and aridity affect more of the planet, these sincere attempts could actually go up in smoke.

The Weakening of Natural Carbon Sinks

Research data indicates that about 50% of the total CO₂ emitted annually remains in the atmosphere, while the rest is taken up by oceans and land ecosystems. As the planet warms, these natural carbon sinks are becoming less effective at capturing CO₂, which means that additional CO2 accumulates in the air, further exacerbating global warming. Transferring the mitigation burden onto the land sector simply relieves the fossil fuel industry from the pressure to cut pollution any time soon.

The Carbon Debt and Coming Populations

Achieving carbon neutrality by mid-century requires CO2 extraction (CDR), which at present relies almost exclusively on terrestrial methods to absorb excess carbon from the air. Emitting companies can simply purchase offsets to counterbalance their emissions and continue with normal operations. Meanwhile, the planetary heat imbalance resulting from the combustion of hydrocarbons keeps on further disrupt the global climate system. Essentially, we are adding more carbon debt to our planetary credit card, leaving future generations with an insurmountable burden.

To limit the scale and duration of exceeding the global warming targets, the world eventually needs to go well beyond the neutralising effect of carbon neutrality and start to remove cumulative historical emissions to achieve a carbon-negative state.

The Political Distortion of Net Zero

According to the latest numbers from the international carbon research group, vegetation-based CDR is presently absorbing the equivalent of about five percent of annual fossil carbon dioxide emissions, while technology-based CDR represents only about one-millionth of the carbon released from carbon sources. Optimistic sector projections suggest around zero point one percent of total global emissions. At the risk of sounding like a heretic, the policy twisting of net zero is a deceptive gap that takes focus away from the scientific imperative to eliminate the primary cause of our overheating planet—carbon-based energy.

The Urgent Need for Definite Steps

While this scientific reality should lead discussions at the climate summit, history suggests that gradual, cautious steps and political kowtowing will prevail. Vague statements of long-term goals will continue to delay the pressing requirement for definite short-term measures. Unless policymakers are brave enough to implement carbon pricing to terminate the age of hydrocarbons, we are adding increasing amounts of CO2 to the air, compounding the physical catastrophe now unfolding across the globe.

The dilemma we face is simple: take real action to the scientific reality of our crisis or suffer the consequences of this deep ethical lapse for centuries to come.