2. Evolution of the situation. Ozone and greenhouse effect

2.1 Destruction of the ozone layer

Decisions taken to eradicate chlorine-containing fluids appear to be bearing fruit. The latest measurements show a halt in destruction, and experts expect the ozone layer to recover between 2065 and 2080.

Data from the IPCC Fourth assessment report 2007 ( § 7) (table 5 ) show that between 1998 and 2005 :

• a slight reduction (– 1%) in CFC content;

• a 33% increase in HCFC content, which is still...