The climate crisis is a planetary existential threat, disproportionately affecting the poorest populations worldwide. People in low- and middle-income countries (LMICs) experience the most detrimental consequences of climate injustice, endangering their livelihoods, safety, overall wellbeing, and survival. Although the 2022 United Nations Climate Change Conference (COP27) put forth several internationally salient recommendations, the outcomes fall short to efficiently tackle the suffering that exists at the intersection of social and climate injustice. Individuals with serious illness living in LMICs have the highest burden of health-related suffering globally. In fact, more than 61 million people experience serious health-related suffering (SHS) each year that is amenable to palliative care. Despite this well-documented burden of SHS, an estimated 88-90% of palliative care need is unmet, the majority in LMICs. To equitably address suffering at individual, population, and planetary levels in LMICs, a palliative justice approach is crucial. The interplay of human and planetary suffering requires that current planetary health recommendations be expanded to incorporate a whole-person and whole-people perspective that recognizes the need for environmentally conscious and community-based research and policy initiatives. Conversely, palliative care efforts should incorporate planetary health considerations to ensure sustainability in capacity building and service provision. In sum, the optimal health of the planet will remain elusive until we can holistically recognize the value of relieving all suffering due to life-limiting conditions, as well as the value in preserving the natural resources of countries in which all people are born, live, age, suffer, die, and grieve.

Globally, more people die from cardiovascular disease than any other cause. Extreme heat can have serious implications for heart health, especially in people with pre-existing cardiovascular conditions. In this review, we examined the relationship between heat and the leading causes of cardiovascular diseases as well as the proposed physiological mechanisms for the deleterious effect of heat on the heart. The body's response to high temperatures, including dehydration, increased metabolic demand, hypercoagulability, electrolyte imbalances, and systemic inflammatory response, can place a significant strain on the heart. Epidemiological studies showed that heat can result in ischemic heart disease, stroke, heart failure, and arrhythmia. However, targeted research is needed to understand the underlying mechanisms of hot temperatures on these main causes of cardiovascular disease. Meanwhile, the absence of clinical guidance on how to manage heart diseases during heat events highlights the need for cardiologists and other health professionals to lead the charge in addressing the critical relationship between a warming climate and health.

The peculiar nature of scientific publishing has allowed for a high degree of market concentration and a non-collusive oligopoly. The non-substitutable characteristic of scientific journals has facilitated an environment of market concentration. Acquisition of journals on a capabilities-based approach has seen market concentration increase in favor of a small group of dominant publishers. The digital era of scientific publishing has accelerated concentration. Competition laws have failed to prevent anti-competitive practices. The need for government intervention is debated. The definition of scientific publishing as a public good is evaluated to determine the need for intervention. Policy implications are suggested to increase competitiveness in the short-run and present prestige-maintaining alternatives in the long run. A fundamental change in scientific publishing is required to enable socially efficient and equitable access for wider society's benefit.

Many chemicals and toxicants are released into our ecosystem and environment every day, which can cause harmful effects on human populations. Agricultural compounds are used in most crop production and have been shown to cause negative health impacts, including effects on reproduction and other pathologies. Although these chemicals can be helpful for pest and weed control, the compounds indirectly impact humans. Several compounds have been banned in the European Union but continue to be used in the United States. Recent work has shown most toxicants affect transgenerational generations more than the directly exposed generations through epigenetic inheritance. While some toxicants do not impact the directly exposed generation, the later generations that are transgenerational or ancestrally exposed suffer health impacts. Due to impacts to future generations, exposure becomes an environmental justice concern. The term "environmental justice" denotes the application of fair strategies when resolving unjust environmental contamination. Fair treatment means that no group should bear a disproportionate share of negative environmental consequences resulting from industrial, municipal, and commercial operations. This article illustrates how research on directly exposed generations is often prioritized over studies on transgenerational generations. However, research on the latter generations suggests the need to take environmental justice concerns seriously moving forward, as future generations could be unduly shouldering harms, while not enjoying benefits of production.

As they are collectively the most common malignancies, the personal and systemic burden of skin cancers represent a significant public health concern in the United States. Ultraviolet radiation from the sun as well as from artificial sources such as tanning beds is a carcinogen well-known to increase the risk of developing skin cancer in individuals. Public health policies can help mitigate these risks. In this perspectives article, we review sunscreen and sunglasses standards, tanning bed utilization, and workplace sun protection guidelines in the US and provide focused examples for improvement from Australia and the United Kingdom where skin cancer is a well-documented public health concern. These comparative examples can inform interventions in the US that have the potential to modify exposure to risk factors associated with skin cancer.

Healthcare systems intend to address health needs of a community, but unfortunately may also inadvertently exacerbate the climate crisis through increased greenhouse gas (GHG) emissions. Clinical medicine has not evolved to promote sustainability practices. New attention to the enormous impact of healthcare systems on GHG emissions and an escalating climate crisis has resulted in some institutions taking proactive measures to mitigate these negative effects. Some healthcare systems have made large-scale changes to conserve energy and materials, resulting in significant monetary savings. In this paper, we share our experience with developing an interdisciplinary work "green" team within our outpatient general pediatrics practice to implement changes, albeit small, to reduce our workplace carbon footprint. We share our experience with reducing paper usage by consolidating vaccine information sheets into a single use information sheet with quick response (QR) codes. We also share ideas for all workplaces to raise awareness of sustainability practices and to foster new ideas to address the climate crisis in both our professional and personal realms. These can help promote hope for the future and shift the collective mindset about climate action.

Climate change poses an existential threat to children's health. Divestment of ownership stakes in fossil fuel companies is one tool available to pediatricians to address climate change. Pediatricians are trusted messengers regarding children's health and therefore bear a unique responsibility to advocate for climate and health policies that affect children. Among the impacts of climate change on pediatric patients are allergic rhinitis and asthma; heat-related illnesses; premature birth; injuries from severe storms and fires; vector-borne diseases; and mental illnesses. Children are disproportionately affected as well by climate-related displacement of populations, drought, water shortages, and famine. The human-generated burning of fossil fuels emits greenhouse gases (GHG) such as carbon dioxide, which trap heat in the atmosphere and cause global warming. The US healthcare industry is responsible for 8.5% of the nation's entire greenhouse gases and toxic air pollutants. In this perspectives piece we review the principle of divestment as a strategy for improving childhood health. Healthcare professionals can help combat climate change by embracing divestment in their personal investment portfolios and by their universities, healthcare systems, and professional organizations. We encourage this collaborative organizational effort to reduce greenhouse gas emissions.

Background: Relatively little attention has been paid to the potential effects of rising temperatures on changes in human behavior that lead to health and social consequences, including aggression. This study investigated the association between ambient temperature and aggression using assault death data from Seoul, South Korea (1991-2020). Methods: We conducted a time-stratified case-crossover analysis based on conditional logistic regression to control for relevant covariates. The exposure-response curve was explored, and stratified analyses were conducted by season and sociodemographic characteristics. Results: The overall risk of assault deaths significantly increased by 1.4% per 1°C increase in ambient temperature. A positive curvilinear relationship was observed between ambient temperature and assault deaths, which flattened out at 23.6°C during the warm season. Furthermore, risk increases were higher in males, teenagers, and those with the least education. Conclusion: This study highlighted the importance of understanding the impact of rising temperatures on aggression in the context of climate change and public health.

Human activities like greenhouse gas emissions, pollution, and deforestation are largely responsible for climate change and biodiversity loss. The climate is a complex system and scientists are striving to predict, prevent, and address the aforementioned issues in order to avoid reaching tipping points. The threat to humankind is not only physical (ie, heat waves, floods, droughts) but also psychological, especially for some groups. Insecurity, danger, chaos, and an unstable system due to climate change have both short- and long-term psychological effects. In this scenario, the need for new psychological categories is emerging, namely, eco-emotions and psychoterratic syndromes which include eco-anxiety, ecological grief, climate worry, and climate trauma. This paper focuses on these new categories, presenting a summary of each one, including definitions, hypotheses, questions, and testological evaluations, as a useful tool to be consulted by researchers and clinicians and to help them in the therapeutic work. Also, this paper endeavors to distinguish between a psychological stress resulting in a positive outcome, such as pro-environmental behavior, compared to a stress that leads to a psychopathology. Prevention and intervention strategies including social and community support are fundamental to help cope with and mitigate the effect of climate change on mental health. In conclusion, the climate crisis has led to an enormous increase in research on climate change and its consequences on mental health. Researchers and clinicians must be prepared to assess this complex phenomenon and provide help to those who cannot cope with anxiety and climatic mourning.

The American Academy of Pediatrics (AAP) was the first major medical society to release a policy statement on the impacts of climate change on pediatric health. It is estimated that globally, children bear the burden of climate-induced disease. However, many undergraduate and graduate medical curricula do not cover this topic. This article builds on previous literature to propose a framework for such a curriculum as well as justify its relevance in light of current accreditation requirements. Some curricular topics include extreme heat and heat-related injury, degradations in air quality and pediatric respiratory disease, spread of vector-borne and diarrheal illness, and mental health effects. Lastly, it addresses clinical applications for this knowledge, including screening vulnerable patients, offering anticipatory guidance, and advocating for the medical benefits of planetary health.

Climate change and environmental health are closely linked with agriculture and food supply. The environment influences accessibility, quality, and variety of foods and drinks that are available for consumption, which in turn influences population health. A growing area of research is the role of dietary intake of nutrients and how they may influence risk for skin cancer. In recent years, our group has studied dietary nutrients, particularly those found in commonly consumed beverages, such as those containing caffeine, citrus products, and alcohol, in large prospective cohorts to evaluate how their intake may influence risk for skin cancer. Our data suggest that intake of citrus juices, when consumed around once per day or more, or around 5 to 6 times per week, may be associated with increased risk for both keratinocyte carcinomas (KC) and malignant melanoma (MM). With regards to alcohol consumption, we have found that intake of white wine may be associated with increased risk for both KC and MM, while beer and red wine have not shown such associations. Lastly, our work suggests caffeinated beverages, including coffee, tea, and cola, may be associated with decreased risk for basal cell carcinoma (BCC) and MM. While the associations between food intake and skin cancer development are complex, and remain to be further analyzed in future studies, we hope that our summary may help guide individuals to small changes they may make towards potentially reducing their risk for certain skin cancers.

Despite increasing awareness of the public and global health ramifications of climate change, there is a lack of curricula discussing climate change within medical education. Where greater societal awareness and improved scientific understanding have begun to grab the attention of members of the medical education community, there is the precedent, the desire, and the need to incorporate climate-health topics into medical education. We hosted semi-structured interviews (n=9) with faculty members at different institutions across the country who have been involved with climate change education. We pursued a qualitative approach to begin an inter-institutional conversation and better understand what support our colleagues and peers need to expand climate-health education, and we identified a set of key barriers to implementation: Obtaining Institutional Resources, Formalizing Initiative Leadership, and Empowering Faculty Involvement. We also began to appreciate the creative strategies that programs across the country have employed to tackle these challenges. Working with interested students to manage workload, advocating for funded faculty positions, and integrating curricular materials in multiple formats are just a few of the approaches that have helped climate-health initiatives to achieve longevity and penetration in the curriculum. A better identification of the challenges and drivers for success in curricular efforts can provide a roadmap to more efficient implementation of climate-health topics within medical education.

Exposure to environmental variables including declining air quality and increasing temperatures can exert detrimental effects on human health including acute exacerbations of chronic diseases. We aim to investigate the association between these exposures and acute health outcomes in a rural community in Colorado. Meteorological and adult emergency department visit data were retrospectively collected (2013-2017); for asthma outcomes, additional data were available (2003-2017). Daily environmental exposure data included PM10, maximum daily temperature (MDT), and mean humidity and precipitation. Total daily counts of emergency department (ED) diagnoses for myocardial infarction, congestive heart failure, urolithiasis, and exacerbation of chronic obstructive pulmonary disease (COPD) and asthma, were calculated during the study period. Time series models using generalized estimating equations were fit for each disease and included all four environmental factors. Between 2013 and 2017, asthma and COPD exacerbation accounted for 30.8% and 25.4% of all ED visits (n=5,113), respectively. We found that for every 5˚C increase in MDT, the rate of urolithiasis visits increased by 13% (95% CI: 2%, 26%) and for every 10μg/m3 increase in 3-day moving average PM10, the rate of urolithiasis visits increased by 7% (95% CI: 1%, 13%). The magnitude of association between 3-day moving average PM10 and rate of urolithiasis visits increased with increasing MDT. The rate of asthma exacerbation significantly increased as 3-day, 7-day, and 21-day moving average PM10 increased. This retrospective study on ED visits is one of the first to investigate the impact of several environmental exposures on adverse health outcomes in a rural community. Research into mitigating the negative impacts of these environmental exposures on health outcomes is needed.

Background: The discontinuation of the Step 2 Clinical Skills Exam (CS) by the United States Medical Licensing Examination (USMLE) eliminated the need for personal travel to testing centers. The carbon emissions associated with CS have not been previously quantified. Objective: To estimate the annual carbon emissions generated by travel to CS Testing Centers (CSTCs) and to explore differences across geographic regions. Methods: We conducted a cross-sectional, observational study by geocoding medical schools and CSTCs to calculate the distance between them. We obtained data from the 2017 matriculant databases of the Association of American Medical Colleges (AAMC) and the American Association of Colleges of Osteopathic Medicine (AACOM). The independent variable was the location as defined by USMLE geographic regions. The dependent variables were distance traveled to CSTCs and estimated carbon emissions in metric tons CO2 (mtCO2) calculated using three models. In model 1 all students used single occupancy vehicles; in model 2, all carpooled; and in model 3, half traveled by train and half by single occupancy vehicle. Results: Our analysis included 197 medical schools. The mean out-of-town travel distance was 280.67 miles (IQR: 97.49-383.42). The mtCO2 associated with travel was 2,807.46 for model 1; 3,135.55 for model 2; and 635.34 for model 3. The Western region traveled the farthest, while the Northeast traveled significantly less than other regions. Conclusion: The annual estimated carbon emissions from travel to CSTCs was approximately 3,000 mtCO2. Northeastern students traveled the shortest distances; the average US medical student expended 0.13 mtCO2. Medical leaders must consider the environmental impact of medical curricula and pursue accordant reforms.