What is meant by sources of energy? Give 2 examples.
The different sources from which we can obtain various types of energy are meant by sources of energy. The 2 examples are:
- Sun --> Perpetual source
- Fossil fuel --> Non-renewable source
Why coal and petrol are called on non-renewable sources of energy?
We all know, coal and petrol are obtained from the earth's crust that is deposited under the earth's crust from millions of years ago. These resources are limited in nature and get depleted after a single-use. It cannot be produced time and often. So, it is called a non-renewable energy source.