Question

What do you mean by alternative (non-conventional) or renewable energy sources? Describe any three renewable energy sources in detail.

Hint:

Renewable energy sources are sustainable, environmentally friendly, and offer an alternative to fossil fuels. Solar, wind, and biomass are among the most commonly used sources.

Answer 1

Alternative (Non-Conventional) or Renewable Energy Sources:
Alternative or renewable energy sources refer to energy sources that are naturally replenished over time and are considered sustainable. Unlike conventional sources of energy, such as fossil fuels, renewable energy sources have minimal environmental impact, do not deplete over time, and are considered more environmentally friendly. These sources of energy include solar energy, wind energy, geothermal energy, hydropower, and biomass.
Three Renewable Energy Sources:
1.
Solar Energy:
Solar energy is the energy harnessed from the sun. It is the most abundant and widely available renewable source of energy. Solar energy can be captured through solar panels (photovoltaic cells) to produce electricity or through solar thermal systems for heating. It is used for generating electricity, heating water, and powering small devices. The major advantage of solar energy is its sustainability and zero emissions. 2.
Wind Energy:
Wind energy is produced by harnessing the kinetic energy of wind through wind turbines. The movement of the blades of the turbine generates mechanical energy, which is converted into electrical energy. Wind farms, both onshore and offshore, are being developed worldwide to produce large amounts of electricity. Wind energy is cost-effective, pollution-free, and renewable, making it an attractive option for energy generation. 3.
Biomass Energy:
Biomass energy is derived from organic materials, such as wood, agricultural crops, and animal waste. These materials can be burned or processed to produce heat, electricity, or biofuels (such as ethanol and biodiesel). Biomass is considered renewable because plants and organic materials can be replenished over time. It is a versatile source of energy and can be used for cooking, heating, and generating electricity. Biomass also helps reduce waste in landfills.
Conclusion:
Renewable energy sources, such as solar, wind, and biomass, offer sustainable solutions to meet the growing global energy demand while reducing environmental damage. These sources of energy are essential for reducing our reliance on fossil fuels and mitigating climate change.