Answer:
Renewable Gas from Locally Available Raw Materials:
- Biogas is the gas that can be produced from locally available raw materials such as recycled waste dung.
- It is a renewable energy source, just like solar and wind energy.
Explanation:
Biogas is a type of gas that is produced through the process of anaerobic digestion. It is generated from organic materials such as recycled waste dung, agricultural residues, and other organic waste materials. Here is a detailed explanation of why biogas is the correct answer:
Biogas:
- Biogas is a mixture of primarily methane (CH4) and carbon dioxide (CO2). It also contains small amounts of other gases like nitrogen, hydrogen, and traces of hydrogen sulfide.
- The production of biogas involves the decomposition of organic materials in the absence of oxygen. This process is called anaerobic digestion.
- Anaerobic digestion occurs in a biogas plant or digester, where the organic materials are broken down by bacteria in a controlled environment.
- The raw materials used in the production of biogas can be locally sourced, such as recycled waste dung from livestock or other organic waste materials from agriculture or food processing industries.
- Biogas can be used as a fuel for cooking, heating, and electricity generation.
- It is considered a renewable energy source because the organic materials used in its production can be continuously replenished.
Other Options:
- LPG (Liquefied Petroleum Gas) is a fossil fuel that is derived from natural gas processing and petroleum refining. It is not produced from locally available raw materials and is not considered a renewable energy source.
- CNG (Compressed Natural Gas) is primarily composed of methane and is derived from natural gas reserves. While it is a cleaner-burning fuel compared to gasoline or diesel, it is not produced from locally available raw materials and is not considered a renewable energy source.
- Greenhouse gases, such as carbon dioxide, methane, and nitrous oxide, are gases that trap heat in the Earth's atmosphere. They are not produced from locally available raw materials and are not considered renewable energy sources.
In conclusion, biogas is the correct answer as it can be produced from locally available raw materials like recycled waste dung and is a renewable energy source, similar to solar and wind energy.