The correct answer is C. Hydrogen.
Hydrogen is a clean-burning fuel that produces no emissions when burned. It is also the most abundant element in the universe, making it a sustainable and renewable resource. Hydrogen can be produced from water using electrolysis, a process that uses electricity to split water molecules into hydrogen and oxygen.
Diesel and kerosene are both fossil fuels that produce emissions when burned. These emissions can contribute to air pollution, climate change, and other environmental problems. Coal is a fossil fuel that produces the most emissions when burned. Coal combustion is a major source of air pollution, including particulate matter, sulfur dioxide, and nitrogen oxides. These pollutants can cause respiratory problems, heart disease, and cancer.
In conclusion, hydrogen is the fuel that causes the least environmental pollution. It is a clean-burning fuel that produces no emissions when burned. It
is also the most abundant element in the universe, making it a sustainable and renewable resource.