Annotated Bibliography

Climate change significantly impacts urban air quality, which in turn affects respiratory health. As temperatures rise, phenomena like the urban heat island effect intensify, trapping heat in cities and exacerbating air pollution. This, in turn, leads to higher concentrations of harmful pollutants like particulate matter (PM) and ground-level ozone (O3), both of which are detrimental to lung health. Elevated temperatures foster the formation of secondary pollutants like O3 through chemical reactions between volatile organic compounds (VOCs) and nitrogen oxides (NOx), while stagnant air conditions, caused by shifts in atmospheric circulation, prevent the dispersion of pollutants, allowing them to accumulate in dense urban areas. Additionally, climate change alters precipitation patterns, leading to extended dry spells that reduce the removal of pollutants and result in higher pollutant levels in the atmosphere. The combined effects of these changes contribute to increased respiratory issues, particularly in urban areas with limited green spaces and vulnerable populations. This resource provides a detailed analysis of how climate change impacts urban air quality, particularly through the exacerbation of air pollutants like particulate matter and ground-level ozone, which directly links to my thesis on the effects of climate change on respiratory health. It supports my research by highlighting the mechanisms through which climate change worsens air pollution and the subsequent health risks for urban populations.

The article “Long-run health consequences of air pollution: Evidence from Indonesia’s forest fires of 1997” argues that there are significant negative effects of pollution on health outcomes, such as lung capacity and hemoglobin, as well as health status that persist in the long run, especially in men and elderly subjects while children are able to recover almost completely from early shocks. Subjective (GHS and ADL) and objective (lung capacity and hemoglobin) health measures for more than 15,000 people came from the Indonesian Family Life Survey, a longitudinal socio-economic survey on households representing about 83% of the Indonesian population; the same households were monitored in 1997 and 10 years later in 2007. The Total Ozone Mapping Spectrometer was used to detect how much pollution was present for each home. These findings are important because the majority of the studies that came before this that established correlation or causation between air pollution and health relied on short-run, cross sectional data. By looking at a more long-term effect, this research can guide treatment plans for those affected by fires; for example, the fact that men seem to be more affected by pollution for objective measures and women are more affected for subjective measures can be used in helping populations. This is also important for our project because we have found a potential new hospital visit data set ranging from 2005 – 2023; this article could help guide us in looking for differences over a long time span and which health indicators could be correlated to pollution. 

The article, “Air Quality and Cardiovascular Health,” by Annette Peters, argues how ambient particulate matter in the atmosphere is associated with a higher risk of death stemming from cardiovascular diseases. Lots of research over the past few decades backs this up, showing how intaking ambient air pollution leads to an increased risk for cardiovascular disease in general, as well as coronary artery disease, altered autonomic nervous system control, and more, including the article “Adverse cardiovascular effects of air pollution” (Mills et al.). This is important as it provides evidence linking air pollution to health effects, which is exactly what my project is about: showing the correlation between air quality in California to the number of hospitalizations for cardiovascular and respiratory cases. Specifically relating to my thesis, Peters discusses several other sources that have done similar work and have found associations between increased air quality levels and increased emergency department visits throughout the US. This proves that there is some narrative within my project and there is room to find real conclusions. Overall, Peters points to the idea that there is a definite association between air pollution and emergency room visits, helping my project gain more backbone and defense.

This paper argues that wildfire air pollutants play a significant role in a higher risk factor in respiratory health urging those in power to provide stricter regulations to ensure safety to vulnerable individuals. This evidence is sourced from a workshop composed by 19 medical professionals conducted at a 2019 workshop by the American Thoracic Society. The significance of this paper lies behind the call to action that in invokes in the reader to bring upon policies to protect the health of the public due to the both short and long term health risks imposed. This relates to my research as it highlights the need for education to be provided regarding wildfires and health concerns on individuals indirectly victimized to wildfire air pollutants. 

Rosser et al.’s “Air Quality Index and Emergency Department Visits and Hospitalizations for Childhood Asthma” addresses the relationship between the Air Quality Index (AQI) and childhood asthma exacerbations. The researchers conducted a time-stratified case-crossover study using medical record data on children aged 6-17 years of age diagnosed with asthma exacerbation at the UPMC Children’s Hospital of Pittsburgh. Results showed that association with childhood asthma was strongest for Particulate Matter (PM), followed by ozone. The study was also able to identify discrepancies in the effects of air pollution by race, with asthma in black children having the strongest association with PM. This research is particularly important because it underscores the effects of air pollution on childhood asthma, a chronic condition that is highly dependent on air quality. This study is relevant to our research topic because asthma attacks are identified as one of the most common effects of adverse respiratory health, and its relationship to air pollution is a key point in our study.

This article in particular argues that the Bushfires of Australia in 2019-2020 affect the rate of hospital admissions for cardiological issues in a Nepean Hospital that are related to the decreased amount of outpatient visits. THe hospital used an analysis of hospital attendance records from jan of 2018- jan of 2020 finding a 15% reduction of patients attending in the middle of the bushfire season. This signifies that there may be a greater need for extensive health measures such as alternative methods of providing healthcare during disasters such as wildfires. This helps to provide supporting evidence on the crisis that environmental disasters can impose on access to healthcare. Thus, calling to action for healthcare professionals to adopt alternative strategies. 

The research paper, “The Short-Term Effects of Air Pollutants on Influenza-like Illness in Jinan, China,” by Wei Su et al., argues that exposure to air pollutants, such as PM2.5, PM10, SO₂, and NO₂, for only a short amount of time can be associated with an increased occurrence of influenza-like illness. The authors support their claim using time-series analyses of hospital records and air quality data from Jinan, China, which show significant correlations between pollutant levels and influenza-like illness cases. This resource is important because it highlights the immediate health consequences of air pollution in infectious disease susceptibility. This study supports my research by providing evidence that poor air quality can worsen respiratory infections, backing the argument that air pollution has both direct and indirect effects on public health. 

The research paper, “Impacts of Air Pollution on Health and Cost of Illness in Jakarta, Indonesia,” by Ginanjar Syuhada et al., argues that air pollution significantly affects public health, leading to increased medical costs and economic burdens. The authors support their claim using hospital admission records, air quality data, and cost-of-illness analyses to quantify the financial impact of diseases linked to pollutants. This resource is important because it not only highlights the health effects of air pollution but also emphasizes the financial effects on individuals and healthcare systems. This study supports my research by demonstrating that poor air quality has far-reaching effects beyond individual health. 

“Air pollution, physical activity and health: A mapping review of the evidence” explores the complex interactions between air pollution and physical activity, investigating how these factors together influence health outcomes. The researchers conducted a non-systematic mapping review of empirical and modeling studies on air pollution exposure and physical activity published until Autumn 2019. Their findings suggest that air pollution can deter physical activity during high pollution episodes and may reduce its health benefits due to increased inhaled pollutants. However, despite potential risks, most studies indicate that the benefits of physical activity outweigh the harms of air pollution exposure, particularly in active transport settings. The study concludes that further research, particularly in low- and middle-income countries and among vulnerable populations, is necessary to better understand these interactions. This research is relevant to our topic as it highlights the importance of considering both air pollution exposure and physical activity in public health policies, emphasizing the need for integrated strategies to maximize health benefits while minimizing risks.

“The Air Quality Health Index and Asthma Morbidity: A Population-Based Study” focuses on the Air Quality Health Index (AQHI) to measure the impact of air quality on asthma morbidity, while adjusting for potential confounding factors. An observational study, the researchers gathered hospitalizations, emergency department visits and outpatient visits relating to asthma from the Ontario patient registry. Potential factors such as age, sex, season, year and region of residence were adjusted to ensure randomness. The study revealed that AQHI values were significantly associated with increased use of asthma-related hospitalizations from the same day up to the following 2 days. The researchers urged a AQHI risk reduction message system to reduce the morbidity rates associated with air pollution in patients with asthma. This study is significant because it highlights the time duration between exposure to air pollution and respiratory-related hospitalizations. It is relevant to our research, as we are conducting a similar observational study based on air quality data in California and the amount of hospitalizations in the emergency departments of each major hospital by year.

The article “Integrated Health Risk Assessment of ozone and nitrogen dioxide pollution during the cold and warm seasons in the Beijing–Tianjin–Hebei region” argues that NO2 pollution in the cold season is more severe compared to the warm season; although NO2 concentrations have been decreasing annually in most of the studied cities, this decrease is leading to to an increase in ozone concentrations during the cold season across all the studied cities, offsetting the health benefits from this decrease in NO2 and revealing a need for a balance between the two pollutants. This study utilized the China National Environmental Monitoring Center for daily average concentrations of pollutants, the Chinese Center for Disease Control for mortality rates, and the Air Quality Health Index for each city using single pollutant models. This resource is important because it provides very valuable information on the dynamics of air pollution; even though decreasing NO2 pollution is very important, and has health benefits, reducing it too much leaves populations vulnerable to O3 and offsets the benefits. This is important for our research because it gives us a more holistic picture of the AQI; it urges us to take a deeper look into the AQI and which pollutant concentrations can be responsible for certain effects and what the time of the year could mean for patients. It builds off the idea that pollutants impact unexpected mortalities, which is a core part of our project.

This resource argues that exposure to elevated levels of particulate matter (PM), particularly from Saharan dust, contributes significantly to respiratory diseases in Senegal, exacerbated by seasonal variations. It uses data from ground-based PM10 measurements in Dakar, satellite aerosol optical depth (AOD) measurements, and WRF model simulations of dust concentrations, alongside health statistics from the Sanitary Data Warehouse of Senegal. This resource is important because it highlights the critical relationship between environmental pollution and public health, specifically respiratory conditions, in a climate-impacted region of West Africa. For my thesis, this resource provides a framework for analyzing how environmental changes, such as shifts in seasonal dust patterns, influence respiratory health outcomes in Senegal, directly linking climate-related pollution to human health, which is central to my research on climate change and respiratory diseases.

The article argues that short-term exposure to fine particulate matter (PM2.5) in various microenvironments is significantly associated with immediate cardiovascular health effects, such as increased heart rate and diastolic blood pressure. The authors use personal, low-cost PM2.5 sensors to measure air quality across different microenvironments in Singapore and employ statistical models to assess the relationship between exposure and cardiovascular outcomes. This resource is important as it addresses the gap in research regarding the short-term health effects of PM2.5 exposure in different settings, providing valuable data for public health interventions. Specifically, this study enhances my research on air pollution and public health by offering evidence on how microenvironmental factors contribute to immediate health risks, which supports the investigation of environmental determinants of cardiovascular diseases in urban populations.