Geography

UNIT 1: USES OF NATURAL RESOURCES

Natural Resources

Natural resources come from the Earth and are essential for providing for human needs. Key categories include:

• Renewable Resources
    - Definition: Resources that do not run out if used wisely and can be replaced naturally.
    - Examples:
      - Water
      - Soil
      - Fish
      - Forests
      - Wind
      - Solar Energy

• Non-Renewable Resources
    - Definition: Resources that have a limited supply and cannot be replaced quickly once depleted.
    - Examples:
      - Coal
      - Oil
      - Gold
      - Iron
      - Copper
      - Platinum

Use of Resources

• Renewable Resources:
    - They are considered sustainable as they can be replenished naturally, such as through farming practices.
• Non-Renewable Resources:
    - Extraction methods include mining, and they are finite, meaning they will eventually run out if not managed properly.

UNIT 2: UNWISE USE OF RESOURCES

Two Main Problems

1. Resource Damage
      - Definition: Harm or destruction of resources.
2. Resource Depletion
      - Definition: The rate of usage exceeds the rate of natural replenishment.

Result of Unwise Use

• The consequences of unsustainability can lead to future generations lacking access to essential resources.

Examples of Unwise Resource Use

• Soil Erosion: Results in poor farming conditions.
• Pollution: Contaminates air and water sources.
• Wasting Electricity: Leads to the depletion of coal reserves.
• Deforestation: Occurs without necessary replanting efforts.
• Overuse: Includes excessive consumption in transportation (cars) and water usage.
• Overfishing: Failure to implement or adhere to recycling efforts.

OVERFISHING

Causes of Overfishing

• Advanced Technology:
    - Tools like nets, modern ships, and fish finders contribute to the efficiency of overfishing.
• Population Growth:
    - Increased human population leads to higher demand for fish.
• Lack of Laws:
    - Insufficient regulations exacerbate the situation.

Effects of Overfishing

• Less Food: Reduction in available fish leads to food scarcity.
• Damage to Marine Ecosystems: Perturbations in fish populations affect overall ocean health.
• Unemployment & Poverty: Fisheries are critical to livelihoods; their decline leads to economic downturns.
• Species Extinction Risk: Some fish species face severe threats of extinction due to unsustainable practices.

Case Study: Mozambique

• Poverty: Economic hardship drives communities toward overfishing.
• Fish Stocks: Continuous depletion leads to diminished fish populations.
• Income Reduction: As fish stocks decline, income also decreases, consequently increasing poverty.
• Poor Diets: Lower availability of fish results in less protein in diets.
• Cycle of Poverty:
    - The interplay is as follows: poverty → overfishing → greater poverty.

OVERGRAZING

Definition of Overgrazing

• Overgrazing occurs when too many animals are present in a given area, preventing plants from recovering.

Effects of Overgrazing

• Bare Soil: Vegetation is unable to regrow, exposing soil.
• Soil Erosion: Loss of protective plant cover leads to erosion.
• Weeds Replace Grass: Lack of healthy grasses allows weeds to thrive.
• Animal Health: Animals become weak and sick, producing less milk and fewer offspring.
• Final Result: The ultimate consequence of these factors is Desertification.

SAHEL CASE STUDY

Geography of the Sahel

• The Sahel is a dry region located between desert areas and more fertile lands.

Problems in the Sahel

• Population Growth: Increasing numbers of people place pressure on resources.
• Overgrazing and Overcropping: Excessive grazing and farming deplete the land.
• Deforestation: Trees are cut down, harming the ecosystem.
• Climate Change: Alters weather patterns, further stressing the environment.
• Result: These factors culminate in desertification, pushing further into lush territories.

SUSTAINABLE VS UNSUSTAINABLE

Definitions

• Sustainable Resources:
    - Usage that allows resources to be used without depleting them, ensuring availability for future generations.
• Unsustainable Resources:
    - Consumption at a rate faster than resources can naturally recover, leading to potential exhaustion of those resources.

Ways to Use Resources Sustainably

• Recycling: Promotes the reuse of materials and less waste.
• Composting: Converts organic waste into valuable soil.
• Rainwater Collection: Captures and reused rainfall, reducing water usage.
• Insulation: Improves energy efficiency in buildings.
• Solar Energy: Utilization of sunlight for energy needs, reducing fossil fuel dependence.
• Biogas: Conversion of organic materials to gas for fuel.
• Efficient Transport: Utilizing methods that reduce energy usage in transportation.
• Growing Food: Approaches such as urban farming minimize the carbon footprint and promote local consumption.