Besides protecting us from ultraviolet radiation, how else has ozone affected life here on Earth?
Without a protective ozone layer, it would have been very difficult for life forms to make the jump from the ocean environment to the land. Early life forms stayed submerged in the oceans because it was water’s job to protect them from the effects of UV radiation. Once the protective ozone layer formed, animals and plants could venture out of the water onto the land and rapidly evolve to fill all the new ecological niches the terrestrial environment offered.
