Answer
Besides the yellow-green light, there is also red light, and blue light. Though yellow-green may be strongest, all the components mix together to produce the white sunlight. Due to strong atmospheric scattering of blue light, the sunlight actually reaching the ground has a yellowish tint.
Work Step by Step
This is similar to listening to the music played by an orchestra. The loudest instrument isn't all that you hear (thank goodness!).
