๐Ÿ”ท What is Energy?

  • Energy is the ability to do work.

  • We need energy for cooking, lighting, transportation, etc.

๐Ÿ”น Characteristics of a Good Source of Energy

  • High energy output (calorific value)

  • Easy to store and transport

  • Affordable and easily available

  • Causes minimal pollution

  • Safe and convenient to use

๐Ÿ”น Types of Energy Sources

TypeFeaturesExamples
RenewableUnlimited, naturally replenishedSolar, wind, water, biomass
Non-renewableLimited, takes millions of yearsCoal, petroleum, natural gas

๐Ÿ”น Conventional Sources

  • Fossil Fuels: Coal, petrol – cause pollution and are limited.

  • Thermal Power: Electricity by burning fossil fuels.

  • Hydropower: Uses falling water from dams to generate electricity.

๐Ÿ”น Non-Conventional Sources

  • Solar Energy: Captured by solar panels.

  • Wind Energy: Windmills convert wind into electricity.

  • Biomass: Organic waste used to produce biogas.

  • Geothermal: Heat from the earth’s interior.

  • Tidal/Wave Energy: Ocean tides and waves generate power.

๐Ÿ”น Nuclear Energy

  • Produced by nuclear fission of uranium/plutonium.

  • Generates large energy but has radiation risks.

๐Ÿ”น Environmental Impact

  • Fossil fuels pollute air and cause global warming.

  • Renewable sources are cleaner and sustainable.

  • Energy conservation is essential for the future.

✅ Conclusion

We must reduce the use of non-renewable sources and promote renewable ones to protect the environment and meet future energy needs