Connection between human health and the environment

Health Risk Concept and Analysis

Any environmental factors capable of causing harm are considered hazards. Health risk is a probabilistic category reflecting the likelihood that a specific hazard will cause harm to an individual or a group of people upon contact (exposure).

To minimize threats at the state level, risk analysis is conducted. According to the methodology of G.G. Onishchenko and co-authors (2002), this process includes three key blocks:

1. Risk assessment: hazard identification, hazard characterization, exposure assessment, and risk characterization.
2. Risk management: comparing various threats, developing an action plan, implementing decisions, and subsequently monitoring their effectiveness.
3. Risk communication: data exchange among risk assessors, decision-makers, and the population.

Classification of Risk Factors

Risk factors are conditions of the occupational or living environment, or behavioral traits, that increase the likelihood of developing pathologies. Traditionally, they are divided into four major groups:

• Lifestyle and personal choices: the most controllable group. This includes poor nutrition, lack of physical activity, bad habits (smoking, alcohol), hazardous occupations, disregard for safety rules, and excessive sun exposure.
• Biological factors: exposure to pathogenic viruses, bacteria, parasites, allergens (pollen), as well as hazards from animals.
• Physical factors and natural disasters: natural disasters (earthquakes, floods, fires, hurricanes).
• Chemical factors: contact with toxic substances via inhalation, skin absorption, or ingestion through water and food.

“Diseases of Civilization” and Human Ecology

Humans differ from animals in that they do not merely adapt to nature, but actively and massively transform it for their own needs using technology. This process is cyclical in nature: satisfying needs leads to environmental degradation, which in turn reduces people's quality of life and impairs their health.

The development of intelligence and medicine has extended life expectancy; however, industrialization, urbanization, and population aging have given rise to “diseases of civilization”. This group of pathologies includes:

• Cardiovascular diseases (hypertension, atherosclerosis, ischemic heart disease).
• Metabolic disorders (obesity, type 2 diabetes mellitus).
• Peptic ulcer disease.
• Allergies, neuroses, immune pathologies, and oncological diseases.

The science of human ecology studies the interaction of human populations with nature. Its main goal is to preserve health, forecast the consequences of anthropogenic intervention, and develop safe environmental quality standards.

Methodological Approaches to Studying Hazards

The impact of the environment on humans can be assessed from two perspectives:

1. Socio-economic (resource deficit approach). Focuses on the lack of basic needs: clean drinking water, quality nutrition, and access to medical care. It studies political and social constraints.
2. Ecological / toxicological (via specific factor exposure). Aimed at the direct study of chemical, physical, and biological agents, as well as lifestyle characteristics that can lead to disease or death.

Briefly: answers to topical questions

Class and exam questions

What else to study on this topic

• Stages of quantitative risk assessment upon contact with chemical substances
• The process of monitoring and evaluating the effectiveness of management decisions in healthcare
• Mechanisms of development of “diseases of civilization” under the influence of urbanization
• Detailed classification of environmental chemical factors

Other topics in the "Human Ecology" section

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