the greenhouse effect is process by radiation from the sun, when the heat radiate to the Earth 6% scattered from atmosphere, 19% absorbed by atmosphere and clouds, 20% scattered and reflected by clouds and last the most 51% absorbed by the Earth that make the Earth is warmed.
Greenhouse gases in atmosphere trap and effect heat may increase by human, pollution also that a result of the Earth becomes warmer. in the same way heat make comfortable for life but heat must suitable.
The Earth receives energy from the Sun in the form UV, visible, and near radiation, most of which passes through the atmosphere without being absorbed.