Sunlight is the main source of energy at the Earth's surface with most energy in the ultraviolet, visible, and short infrared portions of the spectrum.
(Sunlight; is; the main source of energy at the Earth's surface with most energy in the ultraviolet, visible, and short infrared portions of the spectrum)
Sunlight
is
the main source of energy at the Earth's surface with most energy in the ultraviolet, visible, and short infrared portions of the spectrum