Fuel combustion is the dominant source of CO2 emissions.

Methane emissions from agriculture are a source of greenhouse gas.

The largest source of total GHG emissions and of CO2 emissions was fuel combustion (83 and 97 per cent respectively).

Adjustment methods based on correlation of emissions removals between source categories or gases

For many Parties this sector is the single largest source of CO2 emissions.

Correlation of emissions or removals between source categories or gases within an inventory could in some cases be used to estimate emissions or removals of a specific gas or from a specific source category.

Estimates of N2O emissions are highly uncertain, with fuel combustion as the major source.

Airborne emissions of pollutants can lead to damage at large distances from the emission source.

Fuel combustion remained the largest source of CO2 emissions, representing 97.1 per cent of the total.

Update emissions limits in accordance with the new technologies involved in each source.

Agriculture is the largest source of N2O emissions for the majority of reporting Parties, but emissions from transport have been the fastest growing in many of them.

Instead, the land use change and forestry sector is the biggest source of emissions (more than half of total GHG emissions in 1994), mainly due to desertification.

The fastest growing source of CO2 emissions for the majority of Parties was transport, where emissions were increasing even for some of those Parties which in 1995 registered lower levels of total CO2 emissions than in 1990.

The trends in CH4 emissions for 1990 to 1995 varied by source and Party.

Agriculture Many Parties reported that agriculture is the second largest source of emissions after the energy sector.

Reporting of emissions from other source categories was less complete, especially for land use change and forestry.

For eight Parties waste was the fastest growing (or least declining) source of CH4 emissions, while fugitive fuel emissions grew the fastest for six Parties and emissions from agriculture the fastest for three Parties (table 2).

For the Latin America and the Caribbean region, LUCF is reported to be a net source of emissions.

Table 1. Percentage change in CO2 emissions from the major sources (1995 vs. 1990) CO2 source

The air travel of participants proved to be the main source of GHG emissions for previous international and regional meetings.

For six Parties (AUT, FRA, ICE, NOR, NZL, SWE), this sector was the most important source of CO2 emissions.

Emissions from fuel combustion have increased since 1990 for the majority of Parties, with transport being the fastest growing source.

As is shown in table 3, for 14 Parties, fuel combustion was also the fastest growing source of N2O emissions.

Fuel combustion was the largest source of CO2 emissions, 97.1 per cent, with the majority of these emissions coming from the energy and transformation industries and transport (35 and 29 per cent, respectively).

Fuel combustion When adjusting CO2 emissions from one or several disaggregated IPCC source categories, care should be taken that total CO2 emissions are in accordance with the total fuel consumption, which is generally better known than the fuel consumption in each of the disaggregated IPCC source categories.

Fuel combustion When adjusting CO2 emissions from one or several disaggregated IPCC source categories, care should be taken that total CO2 emissions are in accordance with the total fuel consumption, which is generally better known than the fuel consumption in each of the disaggregated IPCC source categories.

The measures described in the national communication target the energy and transformation sector, which is the main source of GHG emissions in Latvia accounting for more than one third of total CO2 emissions in 1990.

Differing definitions of source and sink categories affect the comparison of emission factors and increase uncertainty in estimating and reporting emissions, but they do not affect the comparability of the aggregated GHG emissions reported by Parties.

The fastest growing, or least declining, source of CH4 emissions for about half of the Parties was waste, while the fastest growing source of N2O emissions for the majority of Parties was fuel combustion, mostly for transport purposes, as a consequence of growth in the sector as well as the introduction of catalytic converters.

For ten Parties (CHE, DEU, FIN, ICE, IRE, NLD, NOR, NZL, SLO, USA) agriculture (fertilizer use) was the largest source of N2O emissions in 1995, while emissions from fuel combustion and industrial processes were the largest source for four (AUT, CAN, CZE, SWE) and three (BEL, FRA, GBR) Parties, respectively.

A baseline shall cover emissions from all gases, sectors and source categories listed in Annex A within the project boundary.

Agricultural soils constitute the single largest source of anthropogenic emissions of nitrous oxide (N2O), contributing 81 per cent of the total of 10.5 kilotonnes in 1990.

The second largest source of GHG emissions was agriculture (5.4 per cent), followed by industrial processes (5 per cent) and waste (4 per cent).

Where the result of this calculation is a net source of greenhouse gas emissions, this value shall be subtracted from the assigned amount of that Party.

The transport sector the fastest growing emission source contributed about 50 per cent of total emissions of non methane volatile organic compounds (NMVOC) and accounted for roughly 40 per cent of nitrogen oxide (NOx ) and over a quarter of carbon monoxide (CO) emissions.

The main source of methane (CH4) emissions was agriculture (35 per cent), followed by waste (32 per cent in 1990, 34 per cent in 1995) and fugitive fuel emissions (29 per cent in 1990, 27 per cent in 1995).

Data for the majority of emissions were comparable, in particular on a gas by gas basis, yet many Parties departed from the IPCC guidelines by defining source and sink categories differently or omitting emissions and or categories included by other Parties.

Parties should also provide a brief explanation of the way in which CO2 emissions in the waste source category have been considered, in particular indicating whether the IPCC methodology has been followed in excluding CO2 emissions from organic waste combustion or aerobic decomposition of biogenic products and including emissions from fossil fuel based products (plastics and hydrocarbons).

Parties were consistent in reporting emissions from those main source and sink categories which in 1990 accounted for about 98 per cent of their total GHG emissions expressed in CO2 equivalent, using 1995 Intergovernmental Panel on Climate Change (IPCC) global warming potentials (GWP).

Brazil reported that more than 90 per cent of its electricity generation was from hydropower, which explains why its energy sector was not the biggest source of GHG emissions.

One of the developments that is expected to result in appreciable reductions in CO2 and NOx emissions is the wider penetration of natural gas as an energy source for households.

3. emissions waste measures (of mass and volume of emissions and wastes)

Average CO2 emissions CO2 emissions 1995

Trends in CO2 emissions from transport, total CO2 emissions and total GHG emissions

These other emissions are estimated based on the estimated percentage of these emissions relative to total emissions at previous meetings.