B2.1.8 The Sofia Protocol


The Protocol concerning the Control of Emissions of Nitrogen Oxides or their Transboundary Fluxes is also known as the Sofia Protocol because it was adopted in Sofia, Bulgaria.

The Sofia Protocol required all countries that signed the Protocol to stabilise emissions of Nitrogen Oxides (NOx) against 1987 levels. However some countries committed themselves to 30% reductions by 1998 (compared to levels recorded in any year between 1980 and 1986).

Unfortunately some countries have not met these targets. Nitrogen Oxide emissions have increased between 1987 and 1993 in Spain by 41% and in Italy by 8%.