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As global leaders assemble in Brazil for Cop30, it is crucial to review how we are faring together in lowering global greenhouse gas emissions.

Despite 30 years of United Nations climate conferences, approximately half of the carbon dioxide accumulated in the atmosphere since the Industrial Revolution has been emitted since 1990. Coincidentally, 1990 marked the release of the First Assessment Report by the IPCC, which confirmed the danger of human-caused global warming. As scientists prepare the Seventh Assessment Report, they do so aware that their work remains eclipsed by political agendas. Despite well-intentioned efforts, the world is still dangerously off track to prevent catastrophic climate change.

Record-Breaking CO₂ Levels and Fossil Fuel Dependency

Latest figures show that atmospheric carbon dioxide levels reached a record high of 423.9 parts per million in the year 2024, with the growth rate from the previous year surging by the largest yearly increase since record-keeping started in 1957. Based on the Global Carbon Project, ninety percent of total global CO₂ emissions in last year came from burning fossil fuels, while the remaining 10% resulted from alterations in land use such as deforestation and wildfires.

Although the rise in fossil CO₂ emissions in 2024 was propelled by higher use of natural gas and petroleum—representing over half of worldwide discharges—the use of coal also reached a record high, constituting forty-one percent. In spite of the previous climate summit's evaluation calling for nations to move beyond fossil fuels, global strategies still aim to produce more than double the amount of fossil fuels in 2030 than aligns with keeping planet heating to 1.5 degrees Celsius, with continued extraction of natural gas rationalized as a less polluting bridge fuel.

The Mirage of Eco-Friendly Measures

Rather than focusing on economic incentives to speed up the elimination of fossil fuels, climate policies are heavily reliant on feelgood eco-positive solutions that aim to neutralize carbon emissions by afforestation rather than reducing industrial emissions. Although protecting, enlarging, and restoring ecological absorbers like forests and wetlands is inherently good, studies has shown that there is insufficient territory to achieve the worldwide target of carbon neutrality using nature-based solutions by themselves.

Approximately 1 billion hectares—a territory larger than the USA—is needed to meet carbon neutrality commitments. Over forty percent of this area would need to be transformed from current applications like agriculture to carbon capture initiatives by 2060 at an unprecedented rate.

Even if this regenerative utopia could be realized, forests require years to grow and can burn down, so they should not be viewed as a fast or lasting carbon storage solution, particularly in a rapidly shifting climate. As severe temperatures and aridity affect more of the planet, these well-intentioned efforts could actually be destroyed by fire.

The Weakening of Natural Carbon Sinks

Research data indicates that about half of the total CO₂ emitted each year remains in the atmosphere, 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 builds up in the atmosphere, intensifying climate change. Shifting the reduction responsibility onto the land sector effectively excuses the fossil fuel industry from the pressure to reduce emissions in the near future.

The Carbon Debt and Coming Populations

Reaching net zero by 2050 demands CO2 extraction (CDR), which currently depends largely on terrestrial methods to soak up excess carbon from the atmosphere. Polluters can simply purchase offsets to counterbalance their discharges and continue with normal operations. At the same time, the planetary heat imbalance caused by the combustion of hydrocarbons continues to further destabilise the Earth’s climate. Essentially, we are increasing our climate liability to our planetary credit card, passing on our descendants with an insurmountable burden.

To curb the magnitude and length of exceeding the global warming targets, the planet eventually needs to go well beyond the neutralising effect of net zero and begin to drawdown cumulative historical emissions to reach net negative emissions.

The Political Distortion of Net Zero

Based on the latest numbers from the international carbon research group, vegetation-based CDR is presently absorbing the equivalent of about 5% of annual fossil carbon dioxide emissions, while engineered carbon extraction represents only about a tiny fraction of the carbon released from carbon sources. More generous industry estimates suggest around 0.1% of total global emissions. Without meaning to be controversial, the policy twisting of net zero is a deceptive gap that distracts from the research-based necessity to eradicate the main source of our warming world—carbon-based energy.

The Urgent Need for Definite Steps

Although this research-backed truth should dominate talks at the climate summit, history indicates that polite incrementalism and deference to politics will prevail. Vague statements of long-term goals will keep on postpone the urgent need for concrete immediate action. Unless policymakers have the courage to put a price on carbon to bring the era of fossil fuels to a definitive end, we are adding more and more carbon to the atmosphere, compounding the environmental disaster now unfolding all around us.

The dilemma we confront is straightforward: take real action to the scientific reality of our crisis or endure the consequences of this deep ethical lapse for generations ahead.