We have shown through our experiments that electromagnetic waves generated by Alternating Current induces electric potential in water
Please visit: Generation of Electric Potential by Interaction of Electromagnetic Radiation and Water Helped Prebiotic Synthesis and Reveals Vital Force
So Electromagnetic Radiations can be regarded as one of the key source of electrical energy for the formation of molecular precursors of life i.e. amino acids, bases, ribose phosphates etc. , the important stage of creation of early life on Earth.
Thus, as the natural source of EMR is cosmic, consistent and envelops the Earth uninterrupted, the existence of life on Earth from its origin may be attributed for the same.