Which of the following fuels causes minimum environmental pollution? (1) Diesel (2) Kerosene (3) Hydrogen (4) Coal

Which of the following fuels causes minimum environmental pollution? (1) Diesel (2) Kerosene (3) Hydrogen (4) Coal
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(3) Hydrogen Explanation: Coal, diesel and kerosene are examples of fossil fuels that contribute to pollution. In contrast, hydrogen burns in air, it produces nothing but water vapor and energy. It is considered as totally clean and nonpolluting source of energy.
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