Week 8 Tuesday Flashcards
Environmental health is the responsibility of ____________.
government
Environmental Protection Agency (EPA) (1970) does what?
Consolidate research, monitoring, standards-setting, and enforcement activities to achieve a cleaner, healthier environment in the US
Besides the creation of the EPA in 1970, what else happened that year?
Clean Air Act (1970)
List and describe each of the 3 parts of the physical environment
1) Unaltered (natural): sun-induced skin cancer, radon risk (increased lung CA risk)
2) Altered: Chemicals, radiation, and biological products introduced to the environment
-Intentional vs unintentional introductions
3) Built: Construction, pollution (indoor and outdoor)
1) What has caused a major impact on physical environment? For what 2 reasons?
2) Measuring the burden of disease is difficult. Why?
1) Population boom
-Consumption of resources increases
-Waste production increases
2) Effects may be subtle, may take a long time to affect the body
Urban growth: Over ____% of Americans live in metropolitan areas of 50,000 or more people
85%
List, describe, and give examples of 2 impacts of urban living
1) Crowded conditions in urban areas have contributed to health issues over the years
-Ex: Uncollected garbage
2) Car dependence leads to an increase in air pollution and reduces exercise
-Exs: public transportation , bike lanes, walking paths
bike-share programs
1) When does air pollution occur?
2) Give examples
1) When particulate matter is suspended in the air.
2) Acids, organic chemicals, metals, dust, and pollen/mold spores.
Why do the size of particles in air pollution matter?
Our body’s defenses can dislodge larger particles
BUT smaller particles (<10 microns in diameter, <2.5 microns pose highest risk) can be inhaled into the lungs and absorbed in the bloodstream
How can you see particulate matter?
Visible as smoke, soot, ash, grime on buildings, corroded metals
Particles that are [greater or less] than 10 microns in diameter may get absorbed into the blood stream
greater
What is being done to reduce particle pollution (PM)? (2 things)
1) In 1987, the EPA revised air pollution standards to limit emissions of smaller particles (<10 microns)
-In 1997 (and 2006), EPA revised it again to <2.5 microns
2) Clean Air Act
1) What legislation established strict air quality standards, set limits on several major pollutants, and mandated reduction of automobile and factory emissions?
2) What specific limits and standards did it require?
3) What has been added over the years?
1) The Clean Air Act (1970)
2) Requires EPA to set National Ambient Air Quality Standards for six principal pollutants: CO, Lead, nitrogen oxides, O3, PM, SO2
3) EPA has added asbestos, mercury, beryllium, benzene, coke-oven emissions (coal) and others to the law over the years.
Impact of the Environment on Health:
1) ____ million deaths or ____% of all deaths are due to avoidable environmental causes.
2) How many of these are due to air pollution?
1) 13 million or 20%
2) ½
List the 4 measures of AQI
- Ground level ozone
- Particle pollution
- Carbon monoxide
- Sulfur dioxide
Burden of Disease Due to the Physical Environment
1) Motor vehicle injuries and exposure to toxic substances cause how many deaths a year?
2) What is this as a percent?
1) ~100,000 deaths yearly
2) ~20% preventable deaths yearly (and 10% of all deaths) in the United States
Burden of Disease Due to the Physical Environment
1) Give examples of occupational exposures and injuries
2) _____% of cancer deaths in males are estimated to be caused by occupational exposures
3) Occupational exposures have been decreasing over past ____ years in the US
1) Lung diseases, hearing loss, back pain, etc.
2) 5%
3) 30
1) ________ exposures also alter ecosystems
2) Why?
1) Toxic exposures also alter ecosystems
2) Once chemicals, radiation, and biological products are released into the environment, the process cannot generally be easily reversed.
Give examples of barrier protection
Cilia, keratin, etc
The impacts of ______________ on health are complex and our body has multiple mechanisms for protection (barrier protections).
environment
Risk is affected by what 5 factors?
1) Route of exposure
-Skin, respiratory tract, digestive tract, GU tract
2) Timing of exposure
-Short-term vs long-term?
3) Stage of life
4) Other diseases
-Ex. Chronic lung diseases, HIV/AIDS
5) Special sensitivities
True or false: Location of exposure affects the consequences of the exposure
True
Location of exposure affects the consequences of the exposure. Give an example.
Consequence of heavy metals such as mercury, lead, and cadmium depend on whether exposure via the skin, respiratory or GI tracts
(“Mad as a Hatter”)
The presence of other diseases will affect how the body is impacted by an environmental exposure. Give 2 examples.
Chronic lung diseases and environmental exposures
