When hydrogen is used in a fuel cell, the primary byproduct is pure water, making it a virtually non- polluting energy source at the point of use. Even when hydrogen is combusted, it mainly produces water vapour. While burning in air can produce some nitrogen oxides (NOx) due to high temperatures, this is significantly less polluting compared to burning fossil fuels.
Which one of the following fuels causes minimum environmental pollution ?
Asked in HPPSC HPAS Prelims 2013 · Topic: Pollution (Air Pollution: Types, sources, primary & secondary pollutants, smog, acid rain, effects, control technologies & policies.)
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