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UPSC 1995: Which one of the following fuels causes minimum environmental pollution?
(a)Diesel
(b)Coal
(c)Hydrogen
(d)Kerosene
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Not attemptedCorrect Answer: (c) Hydrogen
Hydrogen combustion produces only water vapour and no carbon-containing exhaust, so it releases virtually no CO₂, SOₓ, particulates or other atmospheric pollutants, whereas diesel, coal and kerosene all emit greenhouse gases and aerosols when burnt. Hence hydrogen is the cleanest of the listed fuels. ([id.scribd.com](https://id.scribd.com/document/731910046/1995?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1995 Environment & Ecology question?▼
The correct answer is option (c): Hydrogen. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Renewable Energy & Green Technologies question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1995, GS Paper 1, as Question 117. It falls under Environment & Ecology > Renewable Energy & Green Technologies.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Renewable Energy & Green Technologies?▼
UPSC has asked 18 questions from Renewable Energy & Green Technologies (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.