Benny Sanchez
ENVR 1301 001
Professor. Walker
March 20, 2024
Activity 3.3.1 Air Pollution
What are the basics of Air Pollution ?
Air pollution is a complex issue that involves various pollutants, including sulfur pollutants, nitrogen pollutants, and hydrocarbon and volatile organic compound (VOC) pollutants. These pollutants contribute to the deterioration of air quality and have detrimental effects on human health and the environment. Heres a brief overview of each category:
1. Sulfur Pollutants:
- Sources: Sulfur pollutants primarily come from the burning of fossil fuels, such as coal and oil, in power plants, industries, and vehicles.
- Effects: When sulfur pollutants are released into the air, they react with moisture to form sulfuric acid, which contributes to acid rain. Acid rain can damage buildings, harm vegetation, and contaminate water bodies, leading to ecosystem disruptions.
- Health Impacts: Inhalation of sulfur pollutants can irritate the respiratory system, cause respiratory symptoms, and exacerbate existing respiratory conditions, such as asthma and bronchitis.
2. Nitrogen Pollutants:
- Sources: Nitrogen pollutants are mainly generated from the burning of fossil fuels, industrial processes, and agricultural activities, particularly the use of fertilizers.
- Effects: Nitrogen pollutants, particularly nitrogen oxides (NOx), contribute to the formation of smog and ground level ozone. These pollutants can also lead to the eutrophication of water bodies, causing oxygen depletion and harming aquatic life.
- Health Impacts: Exposure to nitrogen pollutants can lead to respiratory issues, such as inflammation of the airways, increased risk of respiratory infections, and aggravation of asthma symptoms.
3. Hydrocarbon and Volatile Organic Compound (VOC) Pollutants:
- Sources: Hydrocarbons and VOC pollutants are emitted from various sources, including vehicle exhaust, industrial processes, solvents, and chemical products.
- Effects: These pollutants contribute to the formation of ground-level ozone and smog. They also play a significant role in the formation of secondary organic aerosols, which can have adverse effects on air quality and climate.
- Health Impacts: Inhalation of hydrocarbons and VOC pollutants can cause respiratory irritation, eye and throat irritation, and contribute to the development of respiratory diseases. Some VOCs are also known to have carcinogenic properties.
AQI ?
The AQI, or Air Quality Index, is a measurement used to assess the quality of outdoor air. It provides information about the level of pollution in the air and the associated health risks. The AQI is calculated based on the concentrations of different pollutants, and it is presented on a scale from 0 to 500, with higher values indicating poorer air quality. It helps individuals and communities make informed decisions about outdoor activities and encourages efforts to improve air quality.
Comparison of Current AQI
| Time of Day | AQI Current | AQI Forecast | PM2.5 | O3 |
Aiken, SC (highest) | 10:00 am | 117 | Moderate | 116 | 40 |
San Antonio, TX (Where I Live) | 10:00 am | 38 | Good | 27 | 26 |
Los Angeles, CA | 8:00 am | 57 | Good | 75 | 31 |
First, let's consider the similarities. All three cities have AQI values that indicate relatively good air quality. San Antonio has an AQI of 38, which falls into the "Good" category. At this time San Antonio traffic isn't so heavy. Los Angeles also has a "Good" AQI of 79. Aiken South Carolina, although slightly higher at 117, is still within the "Moderate" category. Still reluctantly high since this too isn't a high traffic time in Aiken. This implies that overall, the air quality in all three cities is considered acceptable for most individuals.
Now, let's explore the differences. Among the three cities, Aiken South Carolina has the highest AQI value of 117, placing it in the "Moderate" category. This suggests that Aiken South Carolina may have slightly poorer air quality compared to San Antonio and Los Angeles. Population and manufacture use of course plays a crucial role on the scales impact. On the other hand, San Antonio has the lowest AQI value of 38, indicating the best air quality among the three cities.
In summary, while San Antonio, Aiken South Carolina, and Los Angeles share the similarity of having AQI values within the "Good" to "Moderate" ranges, Aiken South Carolina has the highest AQI, indicating somewhat lower air quality compared to the other two cities. San Antonio, with an AQI of 38, has the lowest AQI value among the three, signifying the best air quality. It's important to note that AQI values can change throughout the day due to various factors that us humans now call a life style.
Severeness of PM2.5 and O3
PM2.5 refers to particulate matter with a diameter of 2.5 micrometers or smaller. These tiny particles are present in the air and can be made up of a variety of substances, including dust, soot, smoke, and chemical pollutants. PM2.5 particles are small enough to be inhaled deep into the lungs and can even enter the bloodstream.
O3, commonly known as ozone, is a gas that occurs naturally in the Earth's atmosphere. However, at ground level, it is considered a pollutant and a major component of smog. Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight. It is commonly found in urban areas with high levels of vehicle emissions and industrial activities.
Health hazards to humans:
1. Health hazards of PM2.5:
- Respiratory Issues: Inhaling PM2.5 particles can lead to respiratory problems such as coughing, wheezing, shortness of breath, and asthma attacks. The particles can irritate the lungs and airways, and long-term exposure may contribute to the development of chronic respiratory conditions.
- Cardiovascular Effects: PM2.5 particles can enter the bloodstream and cause inflammation in blood vessels, increasing the risk of heart attacks, strokes, and other cardiovascular diseases. Longterm exposure to PM2.5 is associated with an increased risk of cardiovascular mortality.
- General Health Impacts: Exposure to PM2.5 has been linked to a range of health effects, including reduced lung function, aggravated allergies, and increased susceptibility to respiratory infections.
2. Health hazards of O3:
- Respiratory Problems: Breathing in ozone can cause respiratory issues such as coughing, throat irritation, chest discomfort, and shortness of breath. It can also worsen existing respiratory conditions such as asthma, bronchitis, and chronic obstructive pulmonary disease (COPD).
- Lung Inflammation: Ozone can cause inflammation and damage to the lining of the lungs, leading to reduced lung function and increased susceptibility to respiratory infections.
- Systemic Effects: Prolonged exposure to high levels of ozone can have systemic effects, including increased risk of cardiovascular diseases, impaired immune function, and potential developmental and reproductive effects.
Comparison of Current PM2.5 and O3 to EPA Standards
National Standard | San Antonio Current measured over 1 hour | Time of Day |
PM2.5 Average measured over 24 hours - 19 μg/m3 | 7.7 µg/m3 | 8:00 pm |
O3 Average measured over 8 hours - 46 ppb (87 µg/m3) | 32 ppb | 8:00 pm |
(To be truthful, I started getting a bit confused for this section of the charts)
Citations/Resources
Aiken:
Aiken Air Quality Index (AQI) and South Carolina Air Pollution | IQAiR. (n.d.-b). Retrieved March 21, 2024, from https://www.iqair.com/us/usa/south-carolina/aiken
Alternative Fuels Data Center: Pollutants and health. (n.d.). Retrieved March 19, 2024, from https://afdc.energy.gov/vehicles/emissions_pollutants.html
Current Ozone 1-Hour levels. (n.d.). Retrieved March 20, 2024, from https://www.tceq.texas.gov/cgi- bin/compliance/monops/select_curlev.pl
Latest hourly PM-2.5 levels. (n.d.). Retrieved March 20, 2024, from https://www.tceq.texas.gov/cgi- bin/compliance/monops/select_curlev.pl?user_param=88502
Los Angeles:
Los Angeles Air Quality Index (AQI) and California Air Pollution | IQAir. (n.d.). Retrieved March 20, 2024, from https://www.iqair.com/us/usa/california/los-angeles
Omg, A. (2021c, June 17). Everything you need to know about PM2.5. Oransi. Retrieved March 19, 2024, from https://oransi.com/blogs/blog/pm25-what-to-know-about-pm25?utm_term=&utm_campaign=&utm_source=adwords&utm_medium=ppc&hsa_acc=6600833459&hsa_cam=20003903707&hsa_grp=146852654326&hsa_ad=686877058298&hsa_src=g&hsa_tgt=dsa-19959388920&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gad_source=1&gclid=CjwKCAjwte-vBhBFEiwAQSv_xUwgENfuszJoRvoMVa34s0VLf988F8og8JRFrC6Na4wgkS-GeFy-xBoCP64QAvD_BwE
San Antonio:
San Antonio Air Quality Index (AQI) and Texas Air Pollution | IQAir. (n.d.). Retrieved March 21, 2024, from https://www.iqair.com/us/usa/texas/san-antonio
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