The health benefits of reducing micro-heat islands: A 22-year analysis of the impact of urban temperature reduction on heat-related illnesses in California's major cities.

This study investigates the relationship between temporal changes in temperatures characterizing local urban heat islands (UHIs) and heat-related illnesses (HRIs) in seven major cities of California. UHIs, which are a phenomenon that arises in the presence of impervious surfaces or the lack of green spaces exacerbate the effects of extreme heat events, can be measured longitudinally using satellite products. The two objectives of this study were: (1) to identify temperature trends in local temperatures to characterize UHIs across zip code tabulation areas (ZCTAs) in the seven observed cities over a 22-year period and (2) to use propensity score and inverse probability weighting to achieve exchangeability between different types of ZCTAs and assess the difference in hospital admissions recorded as HRIs attributable to temporal changes in UHIs. We use monthly land surface temperature data derived from MODIS Terra imagery from the summer months (June-September) from 2000 to 2022. We categorized ZCTAs (into three groups) based on their monthly land surface temperature trends. Of the 216 ZCTAs included in this study, the summertime land surface temperature trends of 43 decreased, while 161 remained unchanged, and 12 increased. Los Angeles had the greatest number of decreased ZCTAs, San Diego and San Jose had the highest number of increased ZCTAs. To analyze the number of monthly HRI attributable to changes in UHI, we used inverse probability of treatment weighting to analyze the difference in HRI between the years of 2006 and 2017 which were two major extreme heat events over the entire State. We observed an average reduction of 3.2 (95 % CI: 0.5; 5.9) HRIs per month and per ZCTAs in decreased neighborhoods as compared to unchanged. This study emphasizes the importance of urban climate adaptation strategies to mitigate the intensity and prevalence of UHIs to reduce health risks related to heat.

Exploring the role of motherhood in healthcare engagement for women living with HIV in the USA.

Mothers living with HIV are faced with managing their own complex healthcare and wellness needs while caring for their children. Understanding the lived experiences of mothers living with HIV, including grandmothers and mothers with older children - who are less explicitly represented in existing literature, may guide the development of interventions that best support them and their families. This study sought to explore the role of motherhood and related social/structural factors on engagement with HIV care, treatment-seeking behaviour, and overall HIV management among mothers living with HIV in the USA to inform such efforts. Semi-structured interviews were conducted between June and December 2015 with 52 mothers living with HIV, recruited from the Women's Interagency HIV Study (WIHS) sites in four US cities. Five broad themes were identified from the interviews: children as a motivation for optimal HIV management; children as providing logistical support for HIV care and treatment; the importance of social support for mothers; stressors tied to responsibilities of motherhood; and stigma about being a mother living with HIV. Findings underscore the importance of considering the demands of motherhood when developing more effective strategies to support mothers in managing HIV and promoting the overall health and well-being of their families.

The influence of an agricultural intervention on social capital and water insecurity coping strategies: Qualitative evidence from female smallholder farmers living with HIV in western Kenya.

Background: Greater social capital is associated with positive health outcomes and better HIV management. The ways by which social capital may influence household water insecurity (HHWI), a critical determinant of health among persons living with HIV, remain underexplored. Further, despite the importance of reliable water access and use for health and agricultural productivity, few studies have described the strategies smallholder farmers living with HIV use to manage water insecurity. Objective: We qualitatively explored how an agricultural intervention (provision of a treadle pump for irrigation) influenced HHWI coping strategies through its impacts on social capital among smallholder farmers living with HIV in western Kenya. Method: In 2018, we purposively recruited participants from the Shamba Maisha study, a randomized agricultural intervention (NCT02815579) that provided irrigation pumps to improve treatment outcomes and food security among smallholder farmers living with HIV in western Kenya (n = 42). Participants shared their experiences with water insecurity through go-along and photo-elicitation interviews. Data were thematically analyzed using inductively developed codes. Results: Participants described diverse strategies for coping with agricultural water insecurity. Dimensions of social capital such as feelings of belonging, connectedness, and trust influenced the use of the treadle water pump and other water access behaviors. For instance, participants reported borrowing or sharing water pumps with friends and neighbors if they felt they had a good rapport. In addition, participants indicated a willingness to engage in collective activities, such as supporting the operation of the irrigation pump during planting, when they felt sufficiently connected to a larger group. Overall, individuals in the intervention arm described greater social cohesion, reciprocity, and community connectedness than those in the control arm. Conclusion: The impact of an agricultural intervention on water access and use was described as being modified by social capital among female smallholder farmers living with HIV. Findings suggest that social capital may create an enabling environment for implementing strategies that improve the management and reduce the burden of HIV. Measuring these strategies and their associations with HIV outcomes may strengthen our understanding of resilience among female smallholder farmers living with HIV. The development of a coping strategies index and its use in a longitudinal study could help to identify pathways through which social capital influences health and the effectiveness of livelihood interventions.

Distinct patterns of cigarette smoking intensity and other substance use among women who experience housing instability.

BACKGROUND: Recent insights into substance use cessation suggest that outcomes short of long-term abstinence are clinically meaningful and may offer more realistic incremental goals, particularly for highly vulnerable individuals. With the goal of informing tobacco treatment programs, we examined distinct patterns of cigarette smoking and their association with the ongoing use of other substances in women who experience housing instability. METHODS: We recruited participants from a longitudinal study of women experiencing housing instability. Between June 2017 and January 2019, participants completed six monthly survey interviews regarding social conditions and the use of multiple substances. We examined associations between cigarette smoking intensity, including number of cigarettes smoked per day, heavy smoking, and an increase in number of cigarettes smoked from the previous 30-days, and other substance use in the past 7-days. RESULTS: Of the 243 participants, 69 % were current smokers and 58 % were daily smokers. Number of cigarettes smoked per day (Adjusted odds ratio [AOR] 1.02, 95 % CI 1.00-1.03), heavy cigarette smoking, compared to none or light smoking (AOR 2.02, 95 % CI 1.46-2.79), and an increase in number of cigarettes smoked from the previous 30-days (AOR 1.06, 95 % CI 1.01-1.12) were all significantly associated with methamphetamine use in the past 7-days. Associations with other substance use were not as strong. CONCLUSIONS: In a sample of unstably housed women, where almost half used multiple substances, methamphetamine use was associated with higher cigarette smoking intensity. Our findings highlight a potential role for integrating tobacco and methamphetamine use treatment to reduce tobacco use among unstably housed women.

An agricultural livelihood intervention is associated with reduced HIV stigma among people with HIV.

OBJECTIVE: HIV stigma undermines antiretroviral treatment (ART) adherence and viral suppression. Livelihood interventions may target drivers of negative attitudes towards people with HIV (PWH) by improving their health and strengthening their economic contributions. We examined the effects of a multisectoral agricultural livelihood intervention on HIV stigma among PWH in western Kenya. DESIGN: Sixteen health facilities were randomly allocated (1 : 1) to intervention or control arms in Shamba Maisha , a cluster randomized controlled trial that aimed to improve HIV-related health through behavioral, mental health, and nutritional pathways. METHODS: The intervention included a farming loan and agricultural and financial training. Participants had access to farmland and surface water and were at least 18 years old, on ART for more than 6 months, and moderately-to-severely food insecure. We measured internalized, anticipated, and enacted HIV stigma semiannually over 2 years using validated scales. In blinded intent-to-treat analyses, we compared changes in scores over 24 months by study arm, using longitudinal multilevel difference-in-differences linear regression models that accounted for clustering. RESULTS: Of 720 enrolled participants (354 intervention), 55% were women, and the median age was 40 years [interquartile range 34-47 years]. Two-year retention was 94%. Compared with the control arm, the intervention resulted in significant decreases ( P  < 0.001) of 0.42 points [95% confidence interval (CI) -0.52 to -0.31) in internalized stigma, 0.43 points (95% CI -0.51 to -0.34) in anticipated stigma, and 0.13 points (95% CI -0.16 to -0.09) in enacted stigma over 24 months. CONCLUSION: The agricultural livelihood intervention reduced HIV stigma among PWH. Poverty-reduction approaches may be a novel strategy for reducing HIV stigma.

Food is Medicine for HIV: Improved health and hospitalizations in the Changing Health through Food Support (CHEFS-HIV) pragmatic randomized trial.

BACKGROUND: Policy support for "Food is Medicine"-medically tailored meals or groceries to improve health-is rapidly growing. No randomized trials have heretofore investigated the benefits of medically tailored food programs for people living with HIV (PLHIV). METHODS: The CHEFS-HIV pragmatic randomized trial included PLHIV who were clients of Project Open Hand (POH), a San Francisco-based nonprofit food organization. The intervention arm (n = 93) received comprehensive medically tailored meals, groceries, and nutritional education. Control participants (n = 98) received less intensive (POH "standard of care") food services. Health, nutrition, and behavioral outcomes were assessed at baseline and 6 months later. Primary outcomes measured were viral non-suppression and health related quality of life. Mixed models estimated treatment effects as differences-in-differences between arms. RESULTS: The intervention arm had lower odds of hospitalization (odds ratio [OR] = 0.11), food insecurity (OR = 0.23), depressive symptoms (OR = 0.32), antiretroviral therapy adherence <90% (OR = 0.18), and unprotected sex (OR = 0.18), and less fatty food consumption (ß= -0.170 servings/day) over 6 months, compared to the control arm. There was no difference between study arms in viral non-suppression and health-related quality of life over 6 months. CONCLUSIONS: A "Food-is-Medicine" intervention reduced hospitalizations and improved mental and physical health among PLHIV, despite no impact on viral suppression. CLINICAL TRIALS REGISTRATION: NCT03191253.

Barriers to accessing care for cardiometabolic disorders in Malawi: partners as a source of resilience for people living with HIV.

BACKGROUND: People living with HIV (PLWH) are at increased risk of cardiometabolic disorders (CMD). Adequate access to care for both HIV and CMD is crucial to improving health outcomes; however, there is limited research that have examined couples' experiences accessing such care in resource-constrained settings. We aimed to identify barriers to accessing CMD care among PLWH in Malawi and the role of partners in mitigating these barriers. METHODS: We conducted a qualitative investigation of barriers to CMD care among 25 couples in Malawi. Couples were eligible if at least one partner was living with HIV and had hypertension or diabetes (i.e., the index patient). Index patients were recruited from HIV care clinics in the Zomba district, and their partners were enrolled thereafter. Interviews were conducted separately with both partners to determine barriers to CMD care access and how partners were involved in care. RESULTS: Participants framed their experiences with CMD care by making comparisons to HIV treatment, which was free and consistently available. The main barriers to accessing CMD care included shortage of medications, cost of tests and treatments, high cost of transportation to health facilities, lengthy wait times at health facilities, faulty or unavailable medical equipment and supplies, inadequate monitoring of patients' health conditions, some cultural beliefs about causes of illness, use of herbal therapies as an alternative to prescribed medicine, and inadequate knowledge about CMD treatments. Partners provided support through decision-making on accessing medical care, assisting partners in navigating the healthcare system, and providing financial assistance with transportation and treatment expenses. Partners also helped manage care for CMD, including communicating health information to their partners, providing appointment reminders, supporting medication adherence, and supporting recommended lifestyle behaviors. CONCLUSIONS: Couples identified many barriers to CMD care access, which were perceived as greater challenges than HIV care. Partners provided critical forms of support in navigating these barriers. With the rise of CMD among PLWH, improving access to CMD care should be prioritized, using lessons learned from HIV and integrated care approaches. Partner involvement in CMD care may help mitigate most barriers to CMD care.

Intersectional Stigma, Fear of Negative Evaluation, Depression, and ART Adherence Among Women Living with HIV Who Engage in Substance Use: A Latent Class Serial Mediation Analysis.

Women Living with HIV (WLHIV) who use substances face stigma related to HIV and substance use (SU). The relationship between the intersection of these stigmas and adherence to antiretroviral therapy (ART), as well as the underlying mechanisms, remains poorly understood. This study aimed to examine the association between intersectional HIV and SU stigma and ART adherence, while also exploring the potential role of depression and fear of negative evaluation (FNE) by other people in explaining this association. We analyzed data from 409 WLHIV collected between April 2016 and April 2017, Using Multidimensional Latent Class Item Response Theory analysis. We identified five subgroups (i.e., latent classes [C]) of WLHIV with different combinations of experienced SU and HIV stigma levels: (C1) low HIV and SU stigma; (C2) moderate SU stigma; (C3) higher HIV and lower SU stigma; (C4) moderate HIV and high SU stigma; and (C5) high HIV and moderate SU stigma. Medication adherence differed significantly among these classes. Women in the class with moderate HIV and high SU stigma had lower adherence than other classes. A serial mediation analysis suggested that FNE and depression symptoms are mechanisms that contribute to explaining the differences in ART adherence among WLHIV who experience different combinations of intersectional HIV and SU stigma. We suggest that FNE is a key intervention target to attenuate the effect of intersectional stigma on depression symptoms and ART adherence, and ultimately improve health outcomes among WLHIV.

Complementing the United States Household Food Security Survey Module with Items Reflecting Social Unacceptability.

BACKGROUND: Social unacceptability of food access is part of the lived experience of food insecurity but is not assessed as part of the United States Household Food Security Survey Module (HFSSM). OBJECTIVES: The objectives were as follows: 1) to determine the psychometric properties of 2 additional items on social unacceptability in relation to the HFSSM items and 2) to test whether these 2 items provided added predictive accuracy to that of the HFSSM items for mental health outcomes. METHODS: Cross-sectional data used were from the Intersection of Material-Need Insecurities and HIV and Cardiovascular Health substudy of the Multicenter AIDS Cohort Study/Women's Interagency HIV Study Combined Cohort Study. Data on the 10-item HFSSM and 2 new items reflecting social unacceptability were collected between Fall 2020 and Fall 2021 from 1342 participants from 10 United States cities. The 2 social unacceptability items were examined psychometrically in relation to the HFSSM-10 items using models from item response theory. Linear and logistic regression was used to examine prediction of mental health measured by the 20-item Center for Epidemiologic Studies Depression scale and the 10-item Perceived Stress Scale. RESULTS: The social unacceptability items were affirmed throughout the range of severity of food insecurity but with increasing frequency at higher severity of food insecurity. From item response theory models, the subconstructs reflected in the HFSSM-10 and the subconstruct of social unacceptability were distinct, not falling into one dimension. Regression models confirmed that social unacceptability was distinct from the subconstructs reflected in the HFSSM-10. The social unacceptability items as a separate scale explained more (∼1%) variation in mental health than when combined with the HFSSM-10 items in a single scale, and the social unacceptability subconstruct explained more (∼1%) variation in mental health not explained by the HFSSM-10. CONCLUSIONS: Two social unacceptability items used as a separate scale along with the HFSSM-10 predicted mental health more accurately than did the HFSSM-10 alone.

Longitudinal Associations of Experienced and Perceived Community Stigma With Antiretroviral Therapy Adherence and Viral Suppression in New-to-Care People With HIV: Mediating Roles of Internalized Stigma and Depression Symptoms.

BACKGROUND: Although cross-sectional studies have suggested that HIV-related stigma and depression symptoms may result in poor HIV treatment and health outcomes, few studies have investigated potential longitudinal mechanisms in these relationships. Furthermore, longitudinal effects of HIV-related stigma on health outcomes have not been examined in people with HIV (PWH) newly initiating HIV clinical care. We examined longitudinal associations between experienced and perceived community stigma and health outcomes (antiretroviral therapy [ART] adherence and viral load), mediated by internalized stigma and depression symptoms among new-to-care PWH in the United States. SETTING/METHODS: Data were obtained from 371 PWH who initiated HIV medical care at 4 HIV sites at baseline and 48 weeks later between December 2013 and 2018. Validated measures were used to assess experienced stigma, perceived community stigma, internalized stigma, depression symptoms, and ART adherence, and viral load was obtained from medical records at the final study visit. RESULTS: Serial mediation models revealed significant indirect effects of experienced stigma and perceived community stigma on ART adherence and on viral suppression, first through internalized stigma and then through depression symptoms. CONCLUSIONS: These results suggest that PWH may tend to internalize HIV-related stigma when they experience acts of stigmatization or perceive negative attitudes in society, which in turn may result in negative effects on psychological and physical well-being. These findings about how stigma in society may be an antecedent mechanism for PWH to develop internalized stigma, which in turn affects individual health outcomes, can be used to tailor both individual-level and community-level interventions.

"I too have a responsibility for my partner's life": Communal coping among Malawian couples living with HIV and cardiometabolic disorders.

RATIONALE: HIV and cardiometabolic disorders including hypertension and diabetes pose a serious double threat in Malawi. Supportive couple relationships may be an important resource for managing these conditions. According to the theory of communal coping, couples will more effectively manage illness if they view the illness as "our problem" (shared illness appraisal) and are united in shared behavioral efforts. METHODS: This study qualitatively investigated communal coping of 25 couples living with HIV and hypertension or diabetes in Zomba, Malawi. Partners were interviewed separately regarding relationship quality, shared illness appraisal, communal coping, and dyadic management of illness. RESULTS: Most participants (80%) were living with HIV, and more than half were also living with hypertension. Most participants expressed high levels of unity and the view that illness was "our problem." In some couples, partners expected but did not extend help and support and reported little collaboration. Communal coping and dyadic management were strongly gendered. Some women reported a one-sided support relationship in which they gave but did not receive support. Women were also more likely to initiate support interactions and offered more varied support than men. In couples with poor relationship quality and weak communal coping, dyadic management of illness was also weak. Partner support was particularly crucial for dietary changes, as women typically prepared meals for the entire family. Other lifestyle changes that could be supported or hindered by a partner included exercise, stress reduction, and medication adherence. CONCLUSION: We conclude that gendered power imbalances may influence the extent to which couple-level ideals translate into actual communal coping and health behaviors. Given that spouses and families of patients are also at risk due to shared environments, we call for a shift from an illness management paradigm to a paradigm of optimizing health for spouses and families regardless of diabetes or hypertension diagnosis.

Association between water insecurity and antiretroviral therapy adherence among pregnant and postpartum women in Greater Accra region of Ghana.

BACKGROUND: Adherence to antiretroviral therapy (ART) can substantially reduce morbidity and mortality among women living with HIV (WLWH) and prevent vertical transmission of HIV. However, in sub-Saharan Africa (SSA), more than 50% of new mothers discontinue ART and HIV care after childbirth. The role of water insecurity (WI) in ART adherence is not well-explored. We examined the relationship between WI and ART adherence among pregnant and postpartum WLWH in Greater Accra region of Ghana. METHODS: Using a cross-sectional survey, we recruited 176 pregnant and postpartum WLWH on ART across 11 health facilities. We examined the association between WI (measured using the Household Water Insecurity Experience Scale, and categorized as moderate and severe WI compard to low WI) and poor ART adherence (defined as scoring a below average observed CASE index score). Bivariate analysis was performed using chi-square test followed by multivariate logistic regression models. We included all variables with p-values less than 0.20 in the multivariate analysis. RESULTS: Most (79.5%) of the pregnant and postpartum WLWH enrolled on ART, were urban residents. Over 2/3 were aged 30 years and older. Overall, 33.5% of respondents had poor ART adherence. Proportion of poor ART adherence was 19.4% among those with low WI, 44.4% in those with moderate WI, and 40.0% among those with high WI. Respondents with moderate household water insecurity had a greater odds of reporting poor ART adherence, as compared to those with low water insecurity (adjusted Odds ratio (aOR) = 2.76, 95%CI: 1.14-6.66, p = 0.024), even after adjusting for food insecurity. Similarly, respondents with high WI had a greater odds of reporting poor ART adherence, as compared to those with low water insecurity (aOR = 1.49, 95%CI: 0.50-4.48, p = 0.479), even after adjusting for food insecurity. CONCLUSION: Water insecurity is prevalent among pregnant and postpartum WLWH and is a significant risk factor for poor ART adherence. Governments and other stakeholders working in HIV care provision should prioritize water security programming for WLWH along the HIV care continuum.

Impact of a livelihood intervention on gender roles and relationship power among people with HIV.

OBJECTIVE: To evaluate the impact of an agricultural livelihood intervention on gender role conflict and sexual relationship power among people with HIV (PWH) in western Kenya. DESIGN: Study participants were enrolled in Shamba Maisha , a cluster randomized controlled trial of an agricultural intervention conducted among PWH across 16 health facilities during 2016-2020. Intervention participants received a water pump, seeds, and agricultural and financial training; control participants received standard of HIV care. METHODS: We assessed men's views on masculinity and gender roles via the validated gender role conflict score (GRCS; range 18-78, higher = greater gender role conflict). We measured gender power imbalances among women via the validated Sexual Relationship Power Scale (SRPS), which combines subscales of relationship control and decision-making dominance (range 1-4, higher = female holds more power). We compared changes over the study period by arm using longitudinal multilevel difference-in-difference linear regression models accounting for clustering of facilities using the intention-to-treat cohort. RESULTS: We enrolled 720 participants (366 intervention, 354 control); 2-year retention was 94%. Median age was 40 and approximately 55% of participants were female. Among men, after 24-months the decrease in GRCS scores was 4.3 points greater in the intervention than the control arm ( P  < 0.001). Among women, the intervention resulted in 0.25 points greater increase in the SRPS compared to the control arm ( P  < 0.001). CONCLUSIONS: Shamba Maisha resulted in less gender role conflict in men and greater sexual relationship power for women. Agricultural livelihood interventions may be a powerful tool to improve gender power imbalances, which may subsequently mitigate poverty and food insecurity.

"High blood pressure comes from thinking too much": Understandings of illness among couples living with cardiometabolic disorders and HIV in Malawi.

Cardiometabolic disorders (CMD) such as hypertension and diabetes are increasingly prevalent in sub-Saharan Africa, placing people living with HIV at risk for cardiovascular disease and threatening the success of HIV care. Spouses are often the primary caregivers for people living with CMD, and understanding patients' and partners' conceptions of CMD could inform care. We conducted semi-structured interviews with 25 couples having a partner living with HIV and either hypertension or diabetes. Couples were recruited from HIV clinics in Malawi and were interviewed on beliefs around symptoms, causation, prevention, and treatment for CMD. Data were analyzed at the individual and dyadic levels using framework analysis and Kleinman's theory of explanatory models as a lens. On average, participants were 51 years old and married for 21 years. Approximately 57%, 14%, and 80% had hypertension, diabetes, and HIV. Couples endorsed a combination of biomedical explanatory models (beliefs around physical and mental health) and traditional explanatory models (beliefs around religion and natural remedies), although tended to emphasize the biomedical model. Half of couples believed stress was the main cause of hypertension. For diabetes, diet was believed to be a common cause. In terms of prevention, dietary changes and physical activity were most frequently mentioned. For disease management, medication adherence and diet modifications were emphasized, with some couples also supporting herbal remedies, stress reduction, and faith in God as strategies. Participants were generally more concerned about CMD than HIV due to poor access to CMD medications and beliefs that CMD could lead to sudden death. Within couples, partners often held many of the same beliefs but diverged around which etiological or preventive factors were most important (e.g., stress versus diet) and the best diet for CMD. Health education programs should involve primary partners to build knowledge of CMD and address overlap with HIV, and reinforce accurate information on lifestyle factors for the prevention and treatment of CMD.

A race to net zero-early lessons from healthcare's decarbonization marathon.

Climate change poses a threat to healthcare systems; at the same time, healthcare systems contribute to a worsening climate. Climate-induced disasters are predicted to increase both the demand for healthcare services while also posing a threat to the integrity of healthcare systems' infrastructures and supply chains. Many healthcare organizations have taken initiatives to prepare for such disasters through implementing carbon emission-reduction practices and infrastructure reinforcement, through globally recognized frameworks and strategies known as Scopes 1, 2, and 3, and decarbonization. We explored the efforts of these early adopters to understand how they are thinking about and addressing climate change's impacts on healthcare. Through a process of reviewing the peer-reviewed literature, publicly available published documents, annual sustainability reports, conference presentations, and participation in a national decarbonization collaborative, we (1) provide a diverse set of examples showcasing the variety of ways healthcare systems are responding; (2) identify a set of emergent key themes to implementing decarbonization practices, such as the role of an organizational culture of iterative improvement and building systems of cross-organizational collaboration; and (3) synthesize the identifiable set of driving factors for long-term sustainability of these decarbonization efforts.

Climate change poses a threat to healthcare systems, while, at the same time, healthcare systems contribute to climate change. Disasters caused by climate change are expected to increase demand for healthcare services and affect healthcare infrastructure and supply chains. Some healthcare organizations have taken steps to prepare for these challenges by implementing carbon-reduction practices and infrastructure reinforcement. To do this, they are using globally recognized frameworks for reducing carbon emissions. Researchers studied these early adopters and their efforts to address climate change in healthcare. They reviewed a variety of published documents, annual sustainability reports, and conference presentations and identified key themes for implementing these carbon-reduction practices. They also identified driving factors for the long-term sustainability of these efforts. This research can help healthcare organizations better prepare for and address the challenges posed by climate change.