Why are forest considered biodiversity hot spots? List two ways in which an individual can contribute effectively to the management of forests and wildlife.
Forests are considered biodiversity hot spots because they have very high level of species richness and a high degree of endemism.
A person can effectively contribute towards the management of forests and wildlife by:
i) Using fewer products which are derived directly from forests and wildlife such as wood, animal skin etc.
ii) Avoid discriminate cutting down of forest for the industrial purpose.
List any four characteristics of a good fuel.
Characteristics of a good fuel are:
i. It should possess low ignition temperature.
ii. It should not leave residue after burning, i.e., it should burn completely.
iii. It should burn without producing too many pollutants.
iv. It should be easily available and accessible
v. Good fuel must be economical.
vi. It should be easy to store and transport.
What are non-renewable resources of energy? Give two examples of such resources.
The energy sources that are consumed at a rate faster than the rate at which they are replenished are called Non-renewable resources.
E.g., Coal and petroleum.
What is meant by biodiversity? List two advantages of conserving forest and wild life.
Biodiversity refers to the variety of living organisms present in the given ecosystem. It includes all the marine and terrestrial organisms. The biodiversity of an area is measured by counting the number of species found in that particular area.
Advantages of conserving forest:
(i) It prevents soil erosion and floods.
(ii) It produces huge amounts of raw materials for the industries.
Advantages of conserving wildlife:
(i) It preserves different kinds of species and thus, maintains the species diversity.
(ii) It helps in maintaining the ecological balance that is required for supporting life.
What is meant by 'sustainable management'? Why is reuse considered better than recycling?
Sustainable Management: It is a pattern of management that promises the use of natural resources in such a way that they meet the human needs in the present as well as in the future.
Advantage of Reuse over Recycling
Recycling requires a large amount of energy and money. Reuse, on the other hand, simply involves using things, again and again, preserves the embodied energy originally used in manufacturing an item. Reuse also creates less air and water pollution than recycling. Hence, reuse is preferred over recycling.
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