Which Fuels Cause Minimum Environmental Pollution?

Hydrogen causes minimum environmental pollution. Hydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of 1.00794 u, hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe’s chemical elemental mass. Stars in the main sequence are mainly composed of hydrogen in its plasma state. Naturally occurring elemental hydrogen is relatively rare on Earth.