Answer :
"Primary energy" is the term used to describe energy in its unprocessed state, before it has been transformed by people into other types of energy like electricity, heat, or fuels for vehicles.
What serves as the systems' main energy source?
For creatures and the ecosystems they are a part of, the Sun is the main source of energy. Producers like plants and algae use the energy from sunlight to create organic matter, which they then combine with carbon dioxide to produce food energy.
Exists a form of energy that has no negative effects on the environment?
Since wind energy doesn't emit any greenhouse gases or harmful pollution, it is one of the greenest and most sustainable ways to produce electricity.
To know more about Primary energy visit :-
https://brainly.com/question/862638
#SPJ4
