Articles in 2023

Global aquatic foods are a key source of nutrition, but how their production is influenced by anthropogenic environmental changes is not well known. The vulnerability of global blue food systems to main environmental stressors and the related spatial impacts across blue food nations are now quantified.

Whether or not marine protected areas (MPAs) deliver positive outcomes for both people and nature remains a challenging question. Using a statistical matching approach, this study provides quantitative evidence of co-benefits for fish and people associated with MPAs in the Mesoamerican region.

Current understanding of how the cropland nitrogen cycle will respond to elevated atmospheric CO₂ is limited. By modelling global nitrogen budgets under elevated CO₂ and providing a monetized impact assessment, this study shows the synergistic effects of elevated CO₂ alone on global croplands.

Chemical upcycling of polyolefin plastic waste over metal-based catalysts is crucial for the circular economy, but currently available methods are incompatible with chlorine-contaminated feedstocks. Here the authors propose a two-stage dechlorination–hydrogenolysis (or hydrocracking) upcycling strategy to tackle this problem.

Current models, based on incremental changes in a single stress, have limited ability to anticipate abrupt ecosystem changes due to climate and human activities. Experiments on four models simulating ecosystems with a range of anthropogenic interactions show how much earlier abrupt change can happen.

A more in-depth understanding of the link between biodiversity and human well-being can help the design of nature-based public health interventions. This study analyses a database of species’ effect traits (colours, sounds and smells) and the diverse well-being responses that they generate.

Food production stability depends on yield, and planted and harvested areas, but most research has only studied yield response to climate. This study finds that planted area and harvestable fraction contribute substantially to US crop production shocks, emphasizing their key role in food system stability.

Despite fishing-induced biomass depletion on coral reefs, fisheries persist. This study presents a framework to evaluate potential reef fisheries productivity across a major fishing pressure gradient and shows evidence of compensatory ecological responses triggered by fishing on coral reefs.

Some countries are disproportionately responsible for climate change damages and should compensate those remaining within fair shares of the 1.5 °C carbon budget. This study presents a procedure to quantify the level of compensation owed in a ‘net zero’ scenario where all countries decarbonize by 2050.

Natural resource extraction often involves violence against environmental defenders, but threats to women defenders tend to be poorly documented. This study analyses displacement, repression, criminalization, violent targeting and assassinations of women environmental defenders worldwide.

Blue carbon ecosystems, such as seagrass meadows and mangrove forests, provide myriad ecosystem services and their restoration has gained global attention. Via enhanced ocean alkalinity, restoring these ecosystems can also promote durable carbon dioxide removal from the atmosphere.

Although key to reducing transport greenhouse gas emissions, not much is known about city-level policies globally. With a spatially explicit monocentric urban economic model, this study analyses the impact of four representative policies to mitigate transport greenhouse gas emissions across 120 cities worldwide.

Rising costs have recently reduced local governments’ efforts to collect recyclables from households, but this study shows that kerb-side recycling should be reconsidered as it can reduce greenhouse gas emissions and be a very cost-effective climate change mitigation strategy.

As an alternative to monetary estimates, this study expresses the costs of climate change in terms of numbers of people left outside the ‘human climate niche’, which reflects the historically highly conserved distribution of human population density relative to mean annual temperature.

More efficient and targeted climate mitigation policies require an improved understanding of how the associated air quality and health benefits will be distributed. This study assesses, at the country level, the health effects of a global carbon price under different future scenarios.

Domestic strategies to increase carbon stocks in agricultural soils can lead to spillover effects in countries with less stringent policies. Thinking beyond domestic policy alone is needed for effective sustainable and climate-smart agriculture.

Understanding how community-based initiatives work is crucial for effective environmental management, but causal evaluations of these efforts are rare. This study presents a national-scale evaluation of a locally managed network of marine areas in Fiji and examines whether the expected mechanisms deliver conservation outcomes.

By reconstructing the number of farms on Earth over 1969–2013, this study shows that under current development trajectories, the number of farms globally will probably halve by the end of the twenty-first century, with a doubling of the average farm size.

The presence of toxic lead enables high photoconversion efficiency of perovskite solar cells but poses environmental and human health concerns. Here the authors address the issues by introducing a cost-effective TiO₂ absorption layer through a scalable process.

Monitoring of gas flaring (GF) can be expensive and practically difficult, but better information about global offshore GF is needed to inform decarbonization policies. This study presents a monitoring framework, a detailed inventory of offshore GF sites and estimates of GF volumes globally.