IGCSE Development Studies: Specimen Questions with Answers 97 - 98 of 98

Explanation

Example of Sustainable development is, using of renewable resources or recycled material for purpose of construction is an example of sustainable development as it won՚t destroy the resources and will help in preserving them for the future generation. Another example of Sustainable development is, without destroying the ecosystem or harming the environment, building of a new community in an underdeveloped area.

Thus, sustainable development is defined as an approach to use the resources in an efficient way that allows the resources to renew or to continue in existence for the present as well as the future generation.

Explanation

Forest is an entire ecosystem which consist of the biotic and the abiotic factors like, animals, insects, birds, plants, tress, and insects. The abiotic factors include water, rocks, and climate. A forest fire is uncontrolled in nature. Sometimes the fire is so large that it takes a long time to recover from such huge fire to control the situation again. Wildfires can result in massive destruction. If a wildfire is cause in such ecosystem it will be a huge loss for all forms of life.

Causes of wildfire are:

• Lightening is a cause for wildfire. Lightning has two components stroke and leader. Fires start with unusual long-lasting hot bolts of lightning and last for a longer period.
• 85 % of the lightning is caused by humans. Human caused fires are due to unattended campfires, debris burning, negligently discarded cigarettes etc.
• Controlled burning for clearing vegetation that becomes out of control.
• Dropping litter- sunlight shining through glass bottles can cause fire too.