Course 01 - Environement & environemental crises

Miliors University Algers

• Presentation:

  • Topic: Environment & Environmental Crisis

  • Presenter: Dr. TAIB Asma

  • Department: Life and Natural Sciences (SNV)

Chapter 1: Environmental Components

• Topics Covered:

  • Environment

  • Environmental Crisis

Definition of Environment

• Comprehension of the term "Environment":

  • Derived from the verb "to surround" - indicates surrounding elements.

  • Basic meaning: the surroundings or context of a defined entity.

  • Can refer to many facets like living conditions, atmosphere, or neighborhood.

Components of Environment

• Definition:

  • Comprises biotic (living) and abiotic (non-living) elements, either natural or artificial.

  • Surrounds defined entities such as individuals, species, communities, and spatial units.

• Objective and Subjective Elements:

  • Objective: measurable elements (e.g., air quality, noise).

  • Subjective: experiential elements (e.g., beauty, site quality).

Key Elements of the Environment

• Categories:

  1. Abiotic Factors:

     • Examples: Climate, soil.

  2. Biotic Factors:

     • Examples: Vegetation, fauna.

  3. Population:

     • Humans and their societal structure.

  4. Culture:

     • Human intellectual and social contributions.

Multifaceted Nature of the Environment

• Themes Covered:

  • Water, air, soil, waste, natural environments, landscape, and energy.

• Involvement of Sectors:

  • Various sectors like industry, agriculture, public health, and local authorities.

Key Environmental Issues

• Major Concerns:

  1. Resource Depletion

  2. Climate Change (global warming)

  3. Pollution (air, water, soil)

  4. Deforestation

  5. Loss of Biodiversity

  6. Waste Management Issues

Types of Pollution

• Air Pollutants:

  • Toxic gases: CO2, CH4, N2O, cadmium, mercury, heavy metals.

  • Industrial and civil dust, contributing to global warming.

• Water Pollution Sources:

  • Industrial waste, sewage, agricultural runoff, and oil spills.

  • Consequences include health hazards and loss of biodiversity.

• Soil Pollution Sources:

  • Industrial waste, agricultural chemicals, plastic waste, urbanization impacts.

  • Consequences include decreased fertility, human health risks, and ecological degradation.

Ecological Crisis

• Human Impact:

  • Categories include plastic waste, industrial waste, and agricultural runoff.

  • Lead to higher greenhouse gas emissions, soil degradation, and loss of biodiversity.

• Consequences:

  • Health hazards, economic burden, threats to wildlife, and resource depletion.

Relationship between Demography and Ecological Crisis

• Factors Influencing Ecological Crisis:

• Deforestation, resource demand, urbanization, and socioeconomic inequality.

• Increased waste generation and vulnerability.

Notable Ecological Disasters

• Historical incidents:

  • 1954: Nuclear fallout from Rongelap (Marshall Islands).

  • 1956: Mercury pollution in Minamata City, Japan.

  • 1986: Chernobyl disaster

  • 2010: Deepwater oil spill

  • 2020: Amazon wildfires.

Critical Questions on Sustainable Development

• How to balance economic/social progress with environmental preservation?

• How to ensure equitable resource distribution globally?

• How to meet the needs of present and future generations sustainably?

• The emergence of sustainable development concepts aimed at these issues.

Key Initiatives to Protect the Environment

• Topics of Focus:

  • Waste Recycling, Carbon Emissions Reduction, Water Conservation.

  • Implement practices such as Reduce, Reuse, Recycle.

Environmental Crisis Solutions

• Priorities for Enhancing Environmental Health:

  • Curbing pollution, afforestation, sustainable energy practices, and marine protection initiatives.

  • Addressing global warming and fostering safe water supply programs.

Conclusion

• Acknowledgement of the presentation and invitation for questions.