In the First (1995) and the Second (1998) Russian National Communications to the UNFCCC, estimates of CO2 and non-CO2 emissions for the 1990 and 1994 were presented. Total emissions of CH4 decreased from 557 Mt CO2-equiv. in 1990 to 412 Mt CO2-equiv. in 1994. The largest source of methane was fugitive emissions from the energy sector. Total N2O emissions were 70 Mt CO2-equiv. in 1990 and 40 Mt CO2-equiv. in 1994. Agriculture was the dominant source of N2O (fertilizer-use and manure storage). The Institute of Global Climate and Ecology carried out first assessments of HFC and PFC emissions. Their total emissions in 1990-1994 were estimated as 40 Mt CO2-equiv./yr. Aluminium production is the main PFC source: 4.7 and 4.2 th.t in 1990 and 1994 respectively. The release of HFC-23 during HCFC-22 production contributed about 0.8 th.t. The current use of HFC-134a is relatively small but it could potentially grow quickly. The improvement of inventory completeness and quality is considered a very important task, especially for New Gases.
