Sub-surface organisms make oxygen, and Earth captures oxygen from the solar wind. UV-C from the Sun breaks apart oxygen molecules, and forms some ozone from them. As the ozone thickens, less and less UV-B reaches the Earth's surface. Mutation and cancer rates decrease, allowing for longer mean lifespans and slowing rates of species generation. Polymeric systems (such as the natural epoxy that holds cellulose fibers) are capable of direct exposure to the environment, with less need for surface replacement (bark will now work). Plants are now capable of developing on the Earth's surface, and animal life can run about on the surface without lots of sacrificial stuff "on top".
Very little connection between the ozone layer and greenhouse gases.
The mantle.
In the K-T layer between the Cretaceous and Tertiary eras.
The ozone layer is present at a distance of 20 km. This distance is a rough estimate. As we cannot get to know the exact distance to a gas.
Between the thin rocky crust and inner core, in order from upper to lower, are the upper mantle, mantle, and outer core.
The Litosphere is the outermost,rigid layer of the Earth and the Crust is the outermost layer of the Earth
Very little connection between the ozone layer and greenhouse gases.
The session layer (layer 5)
mesosystem - this layer provides the connection between the structures of the child's microsystem
mantle
Mesophere
Mesophere
mantle
"mantel"
The mantle.
mantle
Mesophere