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EESA10H3 Lecture Notes - Environmental Health, Geosphere, Sulfur Dioxide

Environmental Science
Course Code
Jovan Stefanovic

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Lecture 1: Human Health and the Environment
Your environment is your health (but not the only factor influencing your health)
What is environmental health?
According to the WHO: “In its broadest sense, environmental health comprises those aspects of human
health, disease and injuries that are determined or influenced by factors in the environment.”
This includes the study of both the direct pathological effects of various
oSocial Environment(housing, urban development, land use and transportation)
What is the environment?
Environment is everything that affect a living organism
Effect of environment on human health is so great
oManmade environment
Poverty is the number one hazard in calculated risk to our health (not chemicals)
Types of Hazards
Chemical hazards (chemicals in air, water, soil and food)
Biological hazards (bacteria, viruses, parasites, allergens, animals such as bees and poisonous snacks)
Cultural hazard (unsafe working conditions, poor diet, drugs, drinking, driving, poverty)
Physical hazards (radiation, fire, tornado, hurricane, volcanic eruption, earthquake)
Environmental crisis: Human alternation of Earth
Atmosphere: CO2 increased 30% since the beginning of the Industrial revolution
Geosphere: 1/3 to 1/12 of the land surface had been transformed by human action
Overpopulation and overconsumption
The declining health of other organisms is the clearest indicator of environmental threats to human health
No single factor is responsible:
oIncrease UV
oTraces of toxic chemicals
oInfections (fungi and bacteria)
Environmental Health:
Environmental factors responsible for 25 % of all preventable diseases
In a developing countries diarrhea and respiratory infections are heading the list
Protecting the environment has been a mainstay of public health practices since 1878
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