MCQ Detailed View

Non-conventional sources of energy are renewable and environmentally friendly energy options that do not rely on fossil fuels. Among the given choices, biogas is a non-conventional energy source.

Biogas is produced through the anaerobic digestion of organic matter such as animal dung, plant waste, or food residues. Microorganisms break down these materials in the absence of oxygen, producing a mixture of gases, mainly methane (CH₄) and carbon dioxide (CO₂). Methane is a combustible gas that can be used for cooking, heating, and electricity generation, making biogas a clean and renewable energy source.

Coal, in contrast, is a conventional energy source. It is a fossil fuel formed from plant material over millions of years. When burned, coal releases large amounts of carbon dioxide and pollutants, contributing to air pollution and climate change.

Algae has potential as a biofuel source and is being studied for renewable energy, but it is not yet widely used as a commercial energy source. “None of these” is incorrect because biogas is an established non-conventional energy source.

Non-conventional energy is important for sustainability. Other examples include solar power, wind energy, tidal energy, and geothermal energy. These sources are inexhaustible and cause minimal harm to the environment. They reduce dependence on fossil fuels and help combat global warming and climate change.

Understanding non-conventional energy is a key concept in Everyday Science, as it explains how humans can meet energy needs in an eco-friendly and sustainable way. Biogas and other renewable energies demonstrate how science and technology can create clean alternatives for daily life.