The ozone layer is in the

The protective ozone layer lies in the stratosphere, roughly fifteen to thirty-five kilometres up.

The thermosphere is far higher and holds little ozone.

The mesosphere sits above the ozone layer and is not its home.

The troposphere is the lowest layer where weather occurs, below the ozone layer.

Stratospheric ozone shields the surface from ultraviolet radiation.

Chlorofluorocarbons thin this layer, creating the polar ozone hole.