Seven of Earth’s 16 climate vital signs at record extremes: Study

The Earth’s climate system is moving deeper into “uncharted territory”, with seven of its 16 climate-related vital signs now at record extremes, a new study has warned, highlighting the accelerating impact of human activities on the planet.
Published in the journal BioScience, the study tracked indicators ranging from greenhouse gas concentrations and global temperatures to ocean conditions, ice levels, the Earth’s energy balance and wildfires. It also examined the human activities driving these changes, including energy consumption, food production, economic growth and land-use change.
“We are witnessing the rapid destabilisation of the Earth’s climate system. This is no longer a warning for the future; it is a diagnosis of the present,” the authors wrote.
The findings paint a concerning picture of a planet under mounting environmental pressure, even as efforts to transition towards cleaner energy gather momentum.
Concentrations of carbon dioxide, methane and nitrous oxide all reached fresh record levels in 2026, the study found. These greenhouse gases trap heat in the atmosphere, contributing to rising global temperatures and intensifying the risks associated with climate change.
The continued dependence on fossil fuels remains a major concern. Consumption of oil, coal and natural gas rose by 0.9 per cent in 2025, with all three reaching record highs. Annual energy-related carbon dioxide emissions also surpassed 41 gigatonnes for the first time, according to the researchers.
The pace of global warming appears to have accelerated sharply over the decades. The study estimated that temperatures rose by around 0.05 degrees Celsius per decade between 1880 and 1970, compared with approximately 0.36 degrees Celsius per decade between 2010 and 2024.
“At current rates, 2 degrees Celsius above pre-industrial levels could be reached before 2050,” the authors warned.
Such warming could intensify the threats posed by extreme weather, rising sea levels and disruptions to ecosystems, while placing additional pressure on food production, water resources and human livelihoods.
The researchers also highlighted the danger posed by climate tipping elements — components of the Earth system that could undergo potentially irreversible changes once critical thresholds are crossed.
The Amazon rainforest is among the ecosystems facing growing risks. The authors warned that the combined effects of rising temperatures and deforestation could push the rainforest beyond an irreversible threshold at around 1.5 degrees Celsius to 1.9 degrees Celsius of warming.
The prospect is particularly troubling because the Amazon plays an important role in storing carbon and regulating the global climate. Its degradation could undermine these functions, potentially releasing more carbon into the atmosphere and further aggravating global warming.
Despite the alarming trends, the study identified encouraging developments in the global energy transition.
Low-carbon sources accounted for roughly 43 per cent of global electricity generation in 2025, while consumption of solar and wind energy grew by approximately 18 per cent.
In a potentially historic shift, renewable energy sources — including solar, wind, hydropower and other renewables — surpassed coal in global electricity generation in 2025.
“For the first time in more than a century of coal-dominated electricity generation, renewable energy sources … have surpassed coal globally, marking a potentially historic turning point in the transition toward clean energy,” the authors said.
However, they cautioned that the progress made so far remains insufficient to stabilise the climate system. The continued rise in fossil fuel consumption and emissions underscores the need to accelerate the transition to cleaner energy while reducing the environmental impact of other human activities.
The researchers stressed that cutting emissions must be accompanied by rapid adaptation measures to protect communities and ecosystems from climate risks that are already emerging.
They highlighted mangrove restoration as one example of an intervention that can deliver multiple benefits. Mangroves can protect coastal areas from storm surges while absorbing and storing carbon, helping communities become more resilient to extreme weather.
A shift towards more plant-based diets could also reduce pressure on food systems vulnerable to climate-related disruptions, while improving soil carbon storage and easing pressure on biodiversity, the authors suggested.
Similarly, distributed solar power could strengthen energy security by reducing vulnerability to storm-related failures in centralised electricity grids. Such systems can help maintain access to electricity while supporting the wider transition away from fossil fuels.
The study emphasised that these measures can address immediate vulnerabilities while contributing to longer-term climate goals. However, their effectiveness will depend on the speed and scale of implementation.
With several planetary indicators already at unprecedented extremes, the researchers warned that incremental progress would not be enough. Although the growth of renewable energy demonstrates that alternatives to fossil fuels are increasingly viable, emissions must fall much faster and adaptation efforts must expand to meet the scale of the challenge.
The findings underline the urgency of a coordinated response that combines emissions reduction, ecosystem protection and measures to make societies more resilient to climate impacts. (Agencies)