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Question

Among the following fuels of energy, which is the most environment friendly?

This question was previously asked in
UGC NET 2017 Paper 3 Geography Question Paper (05-Nov-2017)
The correct answer is

Hydrogen

To determine which fuel is the most environmentally friendly, we need to analyze the environmental impact and emissions associated with each option:

  1. Ethanol: Ethanol is a biofuel produced from plant materials. It is considered renewable because plants can be regrown. However, burning ethanol releases carbon dioxide (CO₂), although it can potentially result in less greenhouse gas production compared to fossil fuels. The production process can also affect land use and biodiversity negatively.
  2. Biogas: Biogas is produced through the anaerobic digestion of organic material such as manure and plant waste. This process captures methane, a potent greenhouse gas, and uses it as fuel. Biogas can help reduce emissions, but depending on the source material and production methods, there might still be some environmental impact.
  3. CNG (Compressed Natural Gas): CNG is a fossil fuel that consists primarily of methane. It burns cleaner than other fossil fuels, with reduced emissions of nitrogen oxides (NOx) and particulate matter. However, it is still a non-renewable source and contributes to greenhouse gas emissions.
  4. Hydrogen: Hydrogen fuel, especially when produced via electrolysis using renewable energy sources, generates only water as a byproduct when used in fuel cells. This makes it highly efficient and clean, as it does not emit CO₂ or other harmful pollutants during use.

In conclusion, Hydrogen is widely recognized as the most environmentally friendly fuel among the options listed when considering its potential for zero emissions at the point of use and its ability to be produced sustainably.

Therefore, the correct answer is Hydrogen.

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Similar Questions

  1. Pyrolysis
    A. is a biochemical conversion process
    B. is useful for production of bio-oil
    C. yields minimum waste
    D. liquid is a good substitute of heating oil
    E. can produce Ethanol
    Choose the correct answer from the options given below:

  2. The total power output in a hydroelectric installation depends upon

    A. the total water flow
    B. the electrical conductivity of water
    C. atmospheric temperature
    D. vertical distance through which water falls

    Choose the correct answer from the options given below:

  3. Given below are two statements : 

    Statement I : By 2025, two-thirds of world's people will be living in water stressed countries. 

    Statement II : Growth of water withdrawal and consumption in Industrial sector is going to overtake that in Agriculture sector by 2025. 

    In the light of the above statements, choose the correct answer from the options given below :

  4. Arrange the following Earth's water compartments in increasing order of the amount of the water they hold.
    A. Rivers and streams
    B. Fresh lakes
    C. Atmosphere
    D. Ice and Snow
    Choose the correct answer from the following options given below :

  5. Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.

     Assertion A : Although internal-combustion engines used in today's vehicles can be adapted to burn hydrogen, hydrogen powered combustion engines probably are not the future of hydrogen fuelled vehicles. 

    Reason R : It is more efficient to convert hydrogen energy directly to electricity using fuel cells. 

    In the light of the above statements, choose the correct answer from the options given below : 

  6. Given below are two statements:

    Statement-I Most of the world's geothermal sites are located in the circum pacific belt known as 'rim of fire'.

    Statement II : Himalayan geothermal fields in India are also part of 'rim of fire'.

    In the light of the above statements, choose the most appropriate answer from the options given below:

  7. Identify the correct sequence of biomass fuels in terms of their energy content per unit mass

  8. Which are the examples of potential kinetic energy? Select your answer from the options given below:
    (i) Water that is behind a dam
    (ii) Radio signals
    (iii) An airplane idling on the runway
    (iv) A satellite before it is launched
    (v) A coiled spring
    (vi) Heat harnessed from the oceans
    Options:

  9. Which of the following materials is widely used in solar cell fabrication?

  10. A geothermal reserve has the stored heat of 5×10¹⁹ J. If the overall efficiency of a geothermal power plant based on this reserve is 0.04, how much power can be produced by the plant in 1 year?


Important Questions from Natural and Energy Resources

  1. Which of the following rocks is formed by the cooling and crystallisation of magma?

  2. Which of the following is the largest sink of CO 2gas?

  3. Which one of the following is not a fossil fuel?

    A. Coal

    B. Oil

    C. Peat

    D. Electricity

  4. From the energy security perspective, which of the following energy sources is considered most secure for India?

  5. Which of the following states has maximum wind power potential in India as per MVRE's latest report?

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