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As global leaders gather in the Brazilian Amazon for the 30th UN Climate Change Conference, it is crucial to assess how we are faring together in lowering global greenhouse gas emissions.

Despite 30 years of UN climate summits, nearly 50% of the carbon dioxide accumulated in the atmosphere after the dawn of industrialization has been emitted after the year 1990. Incidentally, 1990 marked the publication of the First Assessment Report by the IPCC, which verified the threat of anthropogenic climate change. As scientists work on the Seventh Assessment Report, they do so aware that their work remains overshadowed by political agendas. Regardless of well-intentioned efforts, the world is remains far from the path to avert dangerous global warming.

Unprecedented CO₂ Levels and Carbon-Based Fuel Dependency

Latest figures show that CO₂ concentrations hit a new peak of 423.9 parts per million in 2024, with the growth rate from the previous year surging by the largest yearly increase since modern measurements began in 1957. Based on the international carbon monitoring initiative, 90% of worldwide carbon dioxide output in last year originated from the combustion of carbon-based energy sources, while the remaining 10% was due to land-use changes such as deforestation and forest fires.

While the increase in carbon emissions from fuels in recent times was propelled by higher use of natural gas and petroleum—representing over half of worldwide discharges—coal burning also attained a historic peak, making up 41%. In spite of Cop28’s global stocktake calling for nations to transition away from carbon fuels, global strategies still aim to produce more than double the quantity of hydrocarbons in 2030 than aligns with limiting planet heating to 1.5 degrees Celsius, with continued extraction of gas rationalized as a lower emission transition fuel.

The Illusion of Eco-Friendly Measures

Instead of focusing on financial motivators to accelerate the phase-out of carbon fuels, environmental strategies are heavily reliant on feelgood nature positive solutions that aim to neutralize carbon emissions by planting trees rather than reducing factory discharges. While conserving, enlarging, and restoring natural carbon sinks like forests and marshes is beneficial in itself, research has shown that there is insufficient territory to achieve the global goal of net zero emissions using ecological methods by themselves.

Approximately 1 billion hectares—an area bigger than the United States of America—is needed to meet net zero pledges. Over forty percent of this land would need to be converted from existing uses like agriculture to carbon capture initiatives by the year 2060 at an never-before-seen pace.

Although this ideal restoration could be achieved, woodlands require years to grow and are susceptible to fires, so they should not be viewed as a quick or lasting carbon storage solution, particularly in a rapidly shifting climate. While extreme heat and aridity affect larger regions, these sincere attempts could actually be destroyed by fire.

The Diminishing of Planetary Absorbers

Scientific evidence tells us that about half of the total CO₂ emitted annually stays in the air, while the remainder is absorbed by seas and land ecosystems. As the planet warms, these environmental absorbers are becoming less effective at soaking up CO₂, which means that additional CO2 accumulates in the atmosphere, further exacerbating climate change. Shifting the mitigation burden onto the land sector simply relieves the fossil fuel industry from the urgency to cut pollution any time soon.

The Carbon Debt and Future Generations

Reaching carbon neutrality by mid-century demands CO2 extraction (CDR), which currently depends largely on land-based measures to soak up surplus CO2 from the atmosphere. Emitting companies can easily buy carbon credits to counterbalance their emissions and proceed with business as usual. Meanwhile, the planetary heat imbalance caused by the burning of fossil fuels continues to further destabilise the Earth’s climate. In effect, we are increasing our climate liability to our planetary credit card, passing on our descendants with an unpayable liability.

To limit the magnitude and length of exceeding the Paris Agreement temperature goals, the planet eventually needs to go well beyond the balancing impact of net zero and begin to remove cumulative historical emissions to reach net negative emissions.

The Policy Misrepresentation of Carbon Neutrality

According to the latest numbers from the Global Carbon Project, plant-based carbon removal is presently absorbing the equivalent of about 5% of annual fossil carbon dioxide emissions, while technology-based CDR represents only about a tiny fraction of the CO2 emitted from fossil fuels. Optimistic industry estimates place it at around zero point one percent of worldwide CO2 output. At the risk of sounding like a heretic, the political distortion of net zero is a deceptive gap that takes focus away from the research-based necessity to eliminate the main source of our overheating planet—fossil fuels.

The Urgent Need for Definite Steps

Although this scientific reality should lead talks at Cop30, past events indicates that polite incrementalism and political kowtowing will win out. Vague statements of long-term goals will continue to delay the urgent need for concrete immediate action. Unless leaders are brave enough to implement carbon pricing to bring the era of fossil fuels to a definitive end, we are adding increasing amounts of CO2 to the air, compounding the environmental disaster now unfolding all around us.

The challenge we face is simple: genuinely respond to the evidence-based situation of our crisis or endure the results of this deep ethical lapse for centuries to come.