Volume 16 Issue 1, January 2026

Climate denial in political discourse is fuelled by psychological factors such as psychological distance, cognitive dissonance, confirmation bias, loss aversion, existential anxiety and social identity. Effective communication strategies addressing deniers’ motivations are crucial as denial undermines urgent climate action.

Although climate action is undermined by political interests and institutional inertia, multiple safeguards are in place to prevent backsliding on progress so far, and positive feedbacks reinforce progress despite opposing forces. Key elements of climate action are irreversible and can be further strengthened by commitments, investments and positive narratives.

Recent United Nations policymaking on international emissions trading fails to reconcile longstanding flaws that could jeopardize the integrity of these programmes. We call for urgent action by policymakers to safeguard the future of the Paris Agreement.

Decarbonization of the tourism sector faces challenges of structural lock-ins. This Comment challenges the conventional narratives of green tourism and emphasizes to practice more transformative eco-friendly solutions rather than to consume less, with ecotourism as a promising alternative to encourage more low-carbon behaviour in daily life.

Both green industrial policy (‘carrots’) and carbon pricing (‘sticks’) are seen as important instruments for decarbonization, but the sequencing strategy matters. Researchers now demonstrate that carrots alone — without sticks — are unlikely to reach long-term net-zero targets in the USA.

Whether erosion is accelerating or decelerating along Arctic rivers has been unclear, but each trend has distinct implications for the vast amount of carbon stored in permanently frozen soils. Now, research demonstrates that warming air temperatures are driving divergent outcomes for Arctic rivers, causing some to erode their banks more rapidly while others slow down.

We consider potential non-permanence of carbon removal not as an obstacle but as a feature to focus on the compensation for the short-term warming of methane emissions. This could re-open climate finance for nature-based solutions and provide an immediate reduction in temperature stress.

The authors consider studies reporting species range shifts and demonstrate a geometric bias in sampling along latitudinal, rather than longitudinal, gradients. This bias may favour the corroboration of shift expectations with warming and mask other patterns and drivers of species movements.

The authors couple calculations of historical heatwave intensity at present and future global temperatures with exposure–response functions to quantify mortality from extreme heat events in Europe. They project tens of thousands of excess deaths, with limited attenuation from existing adaptations.

Self-reported emissions data are widely used to evaluate corporations’ climate performance, yet concerns exist regarding their credibility. By examining major US companies, researchers find that more than half of them revise, and mainly understate, their emissions data after first report.

Methane emissions have a large short-term impact on temperature, which can be potentially offset by nature-based solutions that provide temporary carbon storage. This research demonstrates such matching could minimize intertemporal welfare trade-offs and avoid various risks for permanent removal.

Green subsidies (carrots) are now becoming a more politically acceptable climate policy option compared with corrective regulations (sticks). However, researcher show that carrots without quick and appropriate sticks will not be sufficient to reach the deep decarbonization goal in the long run.

Energy transition minerals (ETM) are essential for decarbonization, yet extractions often occur in carbon-rich forests and lands of Indigenous peoples and local communities. Here the authors provide global analysis showing how ETM mining causes sustained forest loss and GHG emissions.

It is important to understand the combined effects of multiple changes on the ocean. Here the authors use time of emergence to highlight the increases in impacts of individual and compound changes globally from the surface to the deeper ocean, identifying areas most affected.

Climate change is expected to lead to higher day-to-day temperature variability in mid- to low latitudes. Here the authors show that extreme day-to-day temperature changes have distinct impacts on human health and become more frequent and intense in mid- to low latitudes with climate change.

Whether rivers are speeding up or slowing down in a warming Arctic is unclear, but has implications for carbon cycling and infrastructure. This study finds divergent behaviour in migration rates for rivers in discontinuous versus continuous permafrost, driven by changes in permafrost thaw and river ice.

The authors theoretically delineate the maximal increases in tree growth that can be expected from increases in plant intrinsic water-use efficiency, which increases with rising CO₂. They highlight environmental and physiological limits on growth in the context of experimental data.

The authors model near-ground and within-canopy microclimates in a tropical montane rainforest. They show that short-distance shifts towards dense vegetation or vertically downwards in canopies reduce velocities, highlighting that structurally complex ecosystems may provide short-term climate refuges.

Advanced monsoon onset prediction with multi-week lead time via an artificial intelligence (AI) weather model helps smallholder farmers adapt to a changing climate.