Energy is a concept that refers to different forms such as thermal, light, electrical, chemical, and kinetic that can be converted from one form to another or transformed into work. Common energy sources include fossil fuels like oil and natural gas, as well as renewable sources like solar, wind, hydropower, and biomass. It is important to consider renewable energy sources and ways to conserve energy to reduce environmental impacts.

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ENERGY

2. WHAT IS ENERGY?

4. DIFFERENT FORMS OF ENERGY.

5. MAIN SOURCES OF ENERGY

7. RENEWABLE ENERGY SOURCES

8. SAVING ENERGY