Biosphere

2 Biosphere

Biosphere has two types of components:

  • Biotic Component: The biotic component of biosphere consists of the living organisms which are present in the environment.
  • Abiotic component: Abiotic or physical components of biosphere consist of geographical conditions such as the temperature, rainfall, soil, seasons and the climate.

TYPES OF NATURAL RESOURCES

Natural resources are of two main types

Inexhaustible natural resources:

  • Inexhaustible resources are the natural resources which occur in such abundance.
  • They are not likely to get exhausted despite of continuous usage.
  • Example of inexhaustible resources:  air, water, solar, energy.

Exhaustible natural resources:

  • Exhaustible natural resources are natural resources which are available in limited quantity.
  • They may get depleted by continuous and indiscriminate human consumption.
  • Exhaustible resources are of two kinds
    • Renewable and
    • Non-renewable

Renewable resources:

  • They are exhaustible resources which get replenished regularly.
  • These include both living and non-living resources which can replenish themselves by quick recycling.
  • Renewable resources can last forever if they are used responsibly.
  • Examples of Renewable resources are forest, wildlife, soil and underground water.

Non-renewable resources:

  • They are exhaustible resources which once used cannot be replenished.
  • These resources are non-living.
  • They cannot replenish themselves by recycling and replacement.
  • If not used carefully they will ultimately get exhausted.
  • Their increased consumption results in quicker exhaustion.
  • Examples of Non-renewable resources are minerals, fossil fuels such as coal and petroleum.

Comparison between renewable and non-renewable resources

Renewable resources Non-renewable resources
Replenished within reasonable time. Replenishment is not possible.
Could be used forever provided they are used in limited amounts.

These resources will ultimately lessen and get exhausted.

Their availability can be increased only by enhancing replenishment. Their increased exploitation will result in quick exhaustion.
They are both abiotic and biotic. They are abiotic.
Examples of Renewable resources are forest, wildlife, soil and underground water. Examples of Non-renewable resources are minerals, fossil fuels such as coal and petroleum.

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