On March 22, 1985, countries that belonged to the United Nations agreed to pass the Vienna Convention for the Protection of the Ozone Layer. The agreement became official in 1988.

The ozone layer is an invisible shield found high in the Earth’s atmosphere. The ozone layer protects the Earth from harmful ultraviolet radiation. Use of chlorofluorocarbons (CFCs) depletes the ozone layer. Throughout the 20th century, CFCs were often used in refrigerators and aerosol cans. Most products now use alternatives to CFCs in order to protect the ozone layer.

deplete
Verb

to use up.

Noun

our planet, the third from the Sun. The Earth is the only place in the known universe that supports life.

Noun

layer in the atmosphere containing the gas ozone, which absorbs most of the sun's ultraviolet radiation.

ultraviolet radiation
Noun

powerful light waves that are too short for humans to see, but can penetrate Earth's atmosphere. Ultraviolet is often shortened to UV.

United Nations
Noun

international organization that works for peace, security and cooperation.