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Biofuels are fuels extracted from plants and crops and these have various advantages. These include
1. increasing agricultural diversity.
2. reduced use of fertilizers.
3. renewable source of energy.
Select the correct answer using the codes given below.
  • a)
    1 and 3 only
  • b)
    3 only
  • c)
    2 and 3 only
  • d)
    1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Biofuels are fuels extracted from plants and crops and these have vari...
Answer: b
Explanation:  Biofuels may lead to monoculture where farmers will prefer cultivating such crops which can be used in making biofuels. Fertilizers used in such crops will only increase the fertilizer use. Biofuels are renewable source and this is their advantage compared to non-renewable fossil fuels. Use of Fertilizers: As biofuels are produced from crops and these crops need fertilizers to grow better. The downside of using fertilizers is that they can have harmful effects on surrounding environment and may cause water pollution. Fertilizers contain nitrogen and phosphorus. They can be washed away from soil to nearby lake, river or pond. Monoculture: Monoculture refers to practice of producing same crops year after year, rather than producing various crops through a farmer’s fields over time. While, this might be economically attractive for farmers but growing same crop every year may deprive the soil of nutrients that are put back into the soil through crop rotation. Farmers may be tempted to produce crops which are goof for biofuels.
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Biofuels are fuels extracted from plants and crops and these have vari...
Advantages of Biofuels:
Advantages of biofuels include increasing agricultural diversity, reduced use of fertilizers, and being a renewable source of energy.

Increased Agricultural Diversity:
- By extracting fuels from a variety of plants and crops, biofuels promote agricultural diversity.
- This reduces the dependency on a single crop for fuel production, which can help in maintaining soil health and preventing monoculture farming practices.

Reduced Use of Fertilizers:
- Biofuel crops such as switchgrass and algae require fewer fertilizers compared to traditional crops like corn and soybeans.
- This reduction in fertilizer usage can lead to decreased environmental pollution, including the runoff of harmful chemicals into water bodies.

Renewable Source of Energy:
- Biofuels are derived from organic materials such as plants and crops that can be replenished through natural processes.
- Unlike fossil fuels, which are finite resources, biofuels offer a sustainable and renewable source of energy that can help in reducing greenhouse gas emissions and combating climate change.

Conclusion:
In conclusion, biofuels offer multiple advantages, including increasing agricultural diversity, reducing fertilizer usage, and providing a renewable source of energy. These benefits make biofuels a promising alternative to traditional fossil fuels and contribute to a more sustainable energy future.
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Directions for the following 7 (seven) items: Read the following two passages and answer the items that follow each passage. Your answers to these items should be based on the passages only.Passage -1The law in many parts of the world increasingly restricts the discharge of agricultural slurry into watercourses. The simplest and often the most economically sound practice returns the material to the land as semisolid manure or as sprayed slurry. This dilutes its concentration in the environment to what might have occurred III a more primitive and sustainable type of agriculture and converts pollutant into fertilizer. Soil microorganisms decompose the organic components of sewage and slurry and most of the mineral nutrients become available to be absorbed again by the vegetation.The excess input of nutrients, both nitrogen and phosphorus - based, from agricultural runoff (and human sewag e) has caused many healthy oligotrophic lakes (low nutrient concentrations, low plant productivity with abundant water weeds, and clear water) to change to eutrophic condition where high nutrient inputs lead to high phytoplankton productivity (sometimes dominated by bloomforming toxic species). This makes the water turbid, eliminates large plants and, in the worst situations, leads to anoxia and fish kills; so called cultural eutrophication. Thus, important ecosystem services are lost, including the provisioning service of wild-caught fish and the cultural services associated with recreation.The process of cultural eutrophication of lakes has been understood for some time. But only recently did scientists notice huge dead zones in the oceans near river outlets, particularly those draining large catchment areas such as the Mississippi in North America and the Yangtze in China. The nutrient-enriched water flows through streams, rivers and lakes, and eventually to the estuary and ocean where the ecological impact may be huge, killing virtually all invertebrates and fish in areas up to 70,000 km2 in extent. More than 150 sea areas worldwide are now regularly starved of oxygen as a result of decomposition of algal blooms, fuelled particularly by nitrogen from agricultural runoff of fertilizers and sewage from large cities. Oceanic dead zones are typically associated withindustrialized nations and usually lie off- countries that subsidize their agriculture, encouraging farmers to increase productivity and use more fertilizer.Q.According to the passage, why should the discharge of agricultural slurry into watercourses be restricted?1. Losing nutrients in this way is not a good practice economically.2. Watercourses do not contain the microorganisms that can decompose organic components of agricultural slurry.3. The discharge may lead to the eutrophication of water bodies.

Passage -1The law in many parts of the world increasingly restricts the discharge of agricultural slurry into watercourses. The simplest and often the most economically sound practice returns the material to the land as semisolid manure or as sprayed slurry. This dilutes its concentration in the environment to what might have occurred III a more primitive and sustainable type of agriculture and converts pollutant into fertilizer. Soil microorganisms decompose the organic components of sewage and slurry and most of the mineral nutrients become available to be absorbed again by the vegetation.The excess input of nutrients, both nitrogen and phosphorus - based, from agricultural runoff (and human sewag e) has caused many healthy oligotrophic lakes (low nutrient concentrations, low plant productivity with abundant water weeds, and clear water) to change to eutrophic condition where high nutrient inputs lead to high phytoplankton productivity (sometimes dominated by bloomforming toxic species). This makes the water turbid, eliminates large plants and, in the worst situations, leads to anoxia and fish kills; so called cultural eutrophication. Thus, important ecosystem services are lost, including the provisioning service of wild-caught fish and the cultural services associated with recreation.The process of cultural eutrophication of lakes has been understood for some time. But only recently did scientists notice huge dead zones in the oceans near river outlets, particularly those draining large catchment areas such as the Mississippi in North America and the Yangtze in China. The nutrient-enriched water flows through streams, rivers and lakes, and eventually to the estuary and ocean where the ecological impact may be huge, killing virtually all invertebrates and fish in areas up to 70,000 km2 in extent. More than 150 sea areas worldwide are now regularly starved of oxygen as a result of decomposition of algal blooms, fuelled particularly by nitrogen from agricultural runoff of fertilizers and sewage from large cities. Oceanic dead zones are typically associated withindustrialized nations and usually lie off- countries that subsidize their agriculture, encouraging farmers to increase productivity and use more fertilizer.Q.According to the passage, what are the effects of indiscriminate use of fertilizers?1. Addition of pollutants to the soil and water.2. Destruction decomposer of microorganisms in soil.3. Nutrient enrichment of water bodies.4. Creation of algal blooms.

Passage -1The law in many parts of the world increasingly restricts the discharge of agricultural slurry into watercourses. The simplest and often the most economically sound practice returns the material to the land as semisolid manure or as sprayed slurry. This dilutes its concentration in the environment to what might have occurred III a more primitive and sustainable type of agriculture and converts pollutant into fertilizer. Soil microorganisms decompose the organic components of sewage and slurry and most of the mineral nutrients become available to be absorbed again by the vegetation.The excess input of nutrients, both nitrogen and phosphorus - based, from agricultural runoff (and human sewag e) has caused many healthy oligotrophic lakes (low nutrient concentrations, low plant productivity with abundant water weeds, and clear water) to change to eutrophic condition where high nutrient inputs lead to high phytoplankton productivity (sometimes dominated by bloomforming toxic species). This makes the water turbid, eliminates large plants and, in the worst situations, leads to anoxia and fish kills; so called cultural eutrophication. Thus, important ecosystem services are lost, including the provisioning service of wild-caught fish and the cultural services associated with recreation.The process of cultural eutrophication of lakes has been understood for some time. But only recently did scientists notice huge dead zones in the oceans near river outlets, particularly those draining large catchment areas such as the Mississippi in North America and the Yangtze in China. The nutrient-enriched water flows through streams, rivers and lakes, and eventually to the estuary and ocean where the ecological impact may be huge, killing virtually all invertebrates and fish in areas up to 70,000 km2 in extent. More than 150 sea areas worldwide are now regularly starved of oxygen as a result of decomposition of algal blooms, fuelled particularly by nitrogen from agricultural runoff of fertilizers and sewage from large cities. Oceanic dead zones are typically associated withindustrialized nations and usually lie off- countries that subsidize their agriculture, encouraging farmers to increase productivity and use more fertilizer.Q.What is/are the characteristics of a water body with cultural eutrophication?1. Loss of ecosystem services2. Loss of flora and fauna3. Loss of mineral nutrients

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Biofuels are fuels extracted from plants and crops and these have various advantages. These include1. increasing agricultural diversity.2. reduced use of fertilizers.3. renewable source of energy.Select the correct answer using the codes given below.a)1 and 3 onlyb)3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
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Biofuels are fuels extracted from plants and crops and these have various advantages. These include1. increasing agricultural diversity.2. reduced use of fertilizers.3. renewable source of energy.Select the correct answer using the codes given below.a)1 and 3 onlyb)3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Biofuels are fuels extracted from plants and crops and these have various advantages. These include1. increasing agricultural diversity.2. reduced use of fertilizers.3. renewable source of energy.Select the correct answer using the codes given below.a)1 and 3 onlyb)3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Biofuels are fuels extracted from plants and crops and these have various advantages. These include1. increasing agricultural diversity.2. reduced use of fertilizers.3. renewable source of energy.Select the correct answer using the codes given below.a)1 and 3 onlyb)3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?.
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