The main risk comes from ultraviolet (UV) light, which the Sun emits alongside visible radiation.

主要危险来自太阳与可见辐射一起发射的紫外线（UV）。

And on top of that, when that visible radiation bounces off those molecules, it scatters in all directions.

最重要的是， 当可见辐射从这些分子上反弹时， 它会向各个方向散射。