Question

briefly describe the different type of renewable resources.why do we need them? class 8

Answer 1

Answer:

renewable substances are the substances which can used and regenerated over a long period of time .In one word he resources which can be renewed or reproduced by physical chemical or mechanical process are known as renewable or replenishable resources.

These resources have the ability to remove themselves in a given period of time.

Few forms of renewable resources are water, wind and solar energy. 

1) Water or hydroelectricity: Energy made from moving water

2) Solar : energy received fro the Sun.

3) Geothermal energy: energy from the heat of the Earth.

Why the need for renewable energy:

1) Use of non-renewable resources contaminate environment.

2) The renewable resources are replenishable unlike the non-renewable resources.

3) Fossil fuels are already scarce.

Answer 2

Different type of renewable resources and the need for them

Explanation:

• Renewable sources resources that are continuously refilled by natural processes. Such resources are also called sustainable or green energy, primarily because of their potential to replace non-renewable conventional fossil fuels.
• Renewable resources comprise water, air, biomass energy (such as ethanol), hydropower, geo-thermal power, solar energy and wind energy, among others
• The utilisation of renewable sources adds the more effective use of their own potentials in reduction of greenhouse gas emissions, numerous health benefits, energy production, development of local industry, job creation, and reduction of fossil fuel imports. Moreover, renewable resources are replenished naturally and over comparatively short periods of time