COP26 Special Issue: UN Climate Change Conference 2021

Since the launch of the United Nations (UN) Sustainable Development Goals (SDGs) in 2015, the SDGs have been widely adopted by governments and corporations in an effort to improve their sustainability. There are 17 SDGs, comprising 169 targets, which are measurable against 247 unique indicators. Despite pervasive global pollution from (micro)plastics, there is only one indicator (14.1.1b) under Goal 14, specifically related to reducing impacts from (micro)plastics.

The COVID-19 pandemic and climate change are complex existential threats, unpredictable in many ways and unprecedented in modern times. There are parallels between the scale and scope of their impacts and responses. Understanding shared drivers, coupled vulnerabilities, and criteria for effective responses will help societies worldwide prepare for the simultaneous threats of climate change and future pandemics. We summarize some shared characteristics of COVID-19 and climate change impacts and interventions and discuss key policy implications and recommendations.

By the year 2019, the number of people without access to electricity was 770 million, most of which lived in rural areas. The currently models for rural electrification are often limited in their electrical analysis, or focus on a idealistic optimal solution whilst ignoring the real hierarchical topology of power systems. This work proposes a rural electrification strategy that makes use of Geographic Information System (GIS), graph theory and terrain analysis to create the best electric network topology.

Why is polyandry such a common mating behaviour when it exposes females to a range of significant fitness costs? Here, we investigated whether polyandry protects females against reduced male fertility caused by thermal stress from heatwave conditions. Sperm production and function are vulnerable to heat, and heatwave conditions are forecast to increase as our climate warms, so we examined these effects on female reproduction and mating behaviour in the flour beetle, Tribolium castaneum, a promiscuous ectotherm model in which fertility is damaged by environmental warming.

This paper presents an analysis of the path towards a clean energy transition in rural areas, from the time that households do not have electricity access from any source, to when they get access to the national electricity; considering the intermediate access to an off-grid renewable technology, as well as the post-electrification years. For this, field household-level data are collected through surveys and electricity consumption measurements in rural Kenya.

The ability to maintain a (relatively) stable body temperature in a wide range of thermal environments by use of endogenous heat production is a unique feature of endotherms such as birds. Endothermy is acquired and regulated via various endocrine and molecular pathways, and ultimately allows wide aerial, aquatic, and terrestrial distribution in variable environments. However, due to our changing climate, birds are faced with potential new challenges for thermoregulation, such as more frequent extreme weather events, lower predictability of climate, and increasing mean temperature.

Wildfire is one of the most critical natural disasters that threaten wildlands and forest resources. Traditional firefighting systems, which are based on ground crew inspection, have several limits and can expose firefighters’ lives to danger. Thus, remote sensing technologies have become one of the most demanded strategies to fight against wildfires, especially UAV-based remote sensing technologies. They have been adopted to detect forest fires at their early stages, before becoming uncontrollable.

The mounting research on consumer behavior and climate change is gradually improving our understanding of effective ways to mobilize consumers to mitigate climate change. The relationship between consumer behavior and climate change is complex and most consumers are not capable of determining which behavior changes are worth doing. Research has come a long way identifying the most impactful behavior changes, but more research is needed to refine and situate these insights.

Cyclones and tropical storms are important threats to public health faced by countries worldwide as they are associated with infectious disease outbreaks, unsafe food and water to mention a few. To help meet these challenges, the World Health Organization encourages countries to strengthen their capacities for health emergency and disaster risk management incorporating measures for prevention, mitigation, preparedness, response and recovery. In this letter, we unpack the case of Zimbabwe's preparedness and response to cyclones and tropical storms.

Enabling a circular economy for plastics in Europe and beyond is an ambitious goal. To reach a fully closed loop, numerous challenges and knowledge gaps need to be overcome. This review provides a list of more than 6000 chemicals reported to be found in plastics and an overview of the challenges and gaps in assessing their impacts on the environment and human health along the life cycle of plastic products. We further identified 1518 plastic-related chemicals of concern, which should be prioritized for substitution by safer alternatives.

The purpose of the present paper is to disentangle the mechanisms that connect climate change-induced disasters, inequality and vulnerability by accounting for both directions of causality. We do so by means of a simultaneous equations approach on a panel of 149 countries from 1992 to 2018. The empirical analysis reveals that countries with higher levels of income inequality suffer greater damages when hit by a natural disaster. At the same time, inequality is found to increase the number of people affected by disasters.

Climate, land use and land cover (LULC) changes are among the primary driving forces of soil loss. Decoupling their effects can help in understanding the magnitude and trend of soil loss in response to human activities and ecosystem management. Here, the RUSLE model was applied to estimate the spatial-temporal variations of soil loss rate in the Three Gorges Reservoir (TGR) area during 2001–2015, followed by a scenario design to decouple the effects of climate and LULC changes. The results showed that increasing rainfall generated as much as 2.90 × 107 t soil loss in the TGR area.

Climate change will expose mammals to an array of stressors, some new, and some with increased frequency and severity. Those stressors influence endocrine and metabolic function, with potential consequences for the survival and persistence of mammalian species. Here, we review the similar consequences of climate change on the physiological function of terrestrial mammals, including direct effects of increasing air temperatures and reduced water availability, as well as the indirect effect of reduced or unpredictable food supply.

Sea-level rise poses a significant threat to Small Island Developing States (SIDS) due to the concentration of people, assets, and infrastructure in coastal zones. This review assesses literature on key emerging topics in sea level rise including: the lasting impact of near-term mitigation on long-term sea-level rise; new global coastal vertical elevation data and their impact on existing sea-level rise projections; and the interaction of sea-level rise with other hazards, including salinization, tropical cyclones and extreme precipitation.

Droughts are significant drivers of land degradation, which in turn has adverse effects on resource-dependent rural populations and can potentially lead to livelihood losses and subsequent migration out of affected areas. Linkages between land degradation and migration are complex and not particularly well documented, as they occur within a larger context of multi-scale interactions of socio-economic, political, demographic, and environmental processes. Given these uncertainties, further research in this field is needed.

The Amazon is the most concentrated expression of life on Earth and it is clearly threatened.