Who: Parties to the Montreal Protocol on Substances that Deplete the Ozone Layer

• Key achievement

Space is closer than you think.

Since the mid-1970s scientists have been concerned about the harmful effects of certain chlorofluorocarbons (CFCs) on

The troposphere is the layer of the atmosphere closest to the earth.

The ozone layer is a layer in the Earth's atmosphere containing high concentrations of ozone.

This 3D map shows a 20 km x 20 km area of land and the air above it extending to an altitude of 100 km.

Drag the map to explore the atmosphere! Turn elements of the map on and off using the buttons at the bottom.

Bangkok, 24 April 2015 – Parties to the Montreal Protocol on Substances that Deplete the Ozone Layer