High levels of ozone are good. They will not cause any bad.
If the ozone in the ozone layer is depleted then, more UV will enter the earth. This will cause damage to life on earth.
If the ozone in the ozone layer is depleted then, more UV will enter the earth. This will cause damage to life on earth.
If there wasn't an ozone, the UV rays will enter the earth. These are fatal for life on earth.
If the ozone layer got thinned, UV will enter the earth. They are fatal rays of the earth.
we would all die
Ozone is continually made by the Sun. Ozone made at Earth's surface does not survive to reach the ozone layer.
We will be burn just like sun burn
If the ozone layer was not present on Earth, all life on earth as we know it would die. This is because the sun is constantly shooting powerful energy at the earth that the ozone helps to protect us from as it filters out harming rays.
See "What would happen if the ozone layer vanished?" in the "Related questions" section below.
It would eventually lead to extinction. The reason being ozone is a protector for us in the atmosphere.
Then most of the UV rays will enter the earth. It will finish all life on earth.
If the hole in ozone expands, the UV enters the earth. It will cause more problems to living organisms.