At present the climate change is regarded as one of the most serious global problems. The climate system is influenced by a number of anthropologic activities, and the prevailing role is ascribed to the emissions of greenhouse gases (GHG), which cause the increase of the greenhouse effect. With regard to the global impact the climate change is a worldwide issue and its solution demands the active and constructive approach from all countries. The most serious impacts of the proceeding climate change include the increasing frequency of extreme climatic events (floods, draught, wind storms), sea level rise, decreasing drinking water availability, desertification, biodiversity reduction etc.

People are aware of the seriousness of the problem and therefore already in 1992 the UN Conference on Environment and Development in Rio de Janeiro set the UN Framework Convention on Climate Change (UN FCCC), which entered into force in 1994. The basic objective of the Framework Convention is to create prerequisites for stabilization of GHG concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system. The Framework Convention covers a number of general responsibilities and regulations for the parties, nevertheless there are no specific reduction commitments.

The Kyoto Protocol to the UN Framework Convention on climate change was adopted at the Third Conference of the Parties to the UN FCCC in Kyoto in 1997. Its adoption was appreciated as a major progress, because the Protocol set the quantified emission reduction commitments for the parties and the ways of their achievement. The industrialized countries were legally bound to reduce during the first commitment period (2008–2012), individually or jointly, their emissions of greenhouse gases by at least 5.2 % from the level in 1990. This reduction refers to emissions of carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), fluorinated hydrocarbons – partly (HFC) and completely (PFC) and sulphur hexafluoride (SF₆), expressed as aggregated CO₂ emissions (i.e. in CO₂ equivalents). The Kyoto Protocol covers not only the processes leading to emissions of greenhouse gases into the atmosphere, but also the reversed processes resulting in the removal of CO₂ from the atmosphere and its �storage� in the biomass, by monitoring the land-use changes (afforestation, forest management practice or deforestation).

The Kyoto Protocol is valid for the period 2008–2012, therefore there have been negotiations for several years aimed at the follow up commitments concerning emission reduction after 2013. The year 2009 is a key year as it is expected that on the 15^th UN FCCC Conference of the Parties and the 5^th Meeting of the Parties of the Kyoto Protocol in Copenhagen the new agreement to follow up the Kyoto Protocol will be adopted. This new document should define the reduction commitments and obligations not only for the industrialized countries but also the contribution of the key developing countries. It is expected that the new agreement will bring the change in the system of reduction commitments calculation and probably also some minor changes (extension) of the ways of GHG monitoring and reporting based on the latest scientific knowledge¹. It will be necessary to adapt the national inventory systems to the envisaged changes during the next years.

Climate protection has become the priority issue in the environmental policy both at the highest national and at international levels, for instance within the European Union. At present the EU deals both with emission mitigation and with the adaptation measures to combat climate change. These issues are given high priority. The problem of GHG emission reduction in the EU is solved in a lot of documents and strategies. Among them, the EU Climate change and energy package adopted recently has been mentioned most frequently. This package contains inter alia the directive updating and extending the European Emission Trading Scheme (EU ETS) as well as the recently adopted Decision of the European Parliament and of the Council No. 406/2009/EC on the effort of Member States to reduce their greenhouse gas emissions to meet the Community�s greenhouse gas emission reduction commitments up to 2020. Both these documents will be very important for the national system of greenhouse gas inventories which will have to be modified and updated pursuant the new requirements.

The Framework Convention and the Kyoto Protocol set the use of the unified methods² for the determination of emissions and removals of gases influencing the climate system of the Earth (greenhouse gases). This determination, called the greenhouse gases inventory, is the basis for the control of international commitments set by the Framework Convention on Climate Change and its Kyoto Protocol; in case of the Czech Republic it is the commitment to reduce total GHG emissions by 8 % in 2008–2012 as against the base year 1990 (for HFC, PFC and SF6 1995 was set as the base year). The implementation of the Kyoto Protocol in the European Union is supported legislatively by the Decision of the European Parliament and the Council No. 280/2004/EC and by the respective implementation regulation³. This Decision is currently under revision in order to include the requirements to supply data requested by the newly adopted legislation at the EU level.

The national inventory system, requested by the Kyoto Protocol and by the above mentioned Decision, should ensure the institutional, legislative and procedure arrangements necessary for the fulfilment of all vital activities connected with the inventory process of GHG. In the Czech Republic the body responsible for the proper operation of the national inventory system is the Ministry of the Environment. The ministry authorized the Czech Hydrometeorological Institute (CHMI) to coordinate the preparations of the inventory process and be in charge of the delivery of the requested data and text outputs. One of the procedures includes the implementation of QA/QC control mechanisms, which can result in recalculation of the values if necessary. Therefore the presented data on the values of GHG emissions and removals for individual years may be changed.

Results of National Greenhouse Gas Inventory
The total greenhouse gas emissions including their removals from land use, land-use change and forestry (LULUCF) expressed in equivalents of carbon dioxide (CO2eq.), decreased in the Czech Republic from the level 190.1 mil. tonnes in 1990 to 149.1 mil. tonnes in 2007 (Tab. I.2.2). The emissions (without removals from LULUCF) decreased from 194.7 mil. tonnes to 150.8 mil. tonnes, i.e. compared with the reference year 1990 they decreased by 22.5 %. The inventory also includes HFC, PFC and SF₆ (fluorine containing substances, so called F-gases) emissions, covered also by the Kyoto Protocol. Their share in total GHG emissions was 1.1 % in 2007. The share of CO₂ emissions in total GHG emissions (without LULUCF) was 86.2 % in 2007, the share of CH4 emissions was 7.8 % and the share of N₂O emissions 5.0 %.

CO₂ – carbon dioxide
Carbon dioxide is the most important anthropogenic greenhouse gas. In most industrialized countries it has the greatest share in total aggregated emissions. In the Czech Republic the 2007 share was 85.9 %. CO₂ emissions are caused mainly by fossil fuels combustion, carbonate decomposition in the production of cement, lime, glass, in desulphurization processes and, besides, in metallurgy and chemical industries; CO₂ emissions and removals (in total balance of the sector removals have prevailed so far) occur in the sector Land use, land-use change and forestry (LULUCF). In the Czech Republic the largest shares of CO₂ emissions from combustion processes are contributed by solid fuels, to a less extent liquid and gaseous fuels.

The amount of CO₂ emissions produced by individual activities is illustrated in Fig. I.2.1. Between 1990 and 2007 they decreased by 19.8 % which was contributed mainly by the decrease in the sectors Energy – Manufacturing industries and Other sectors (Residential, Commercial/Institutional). The decrease of emissions during combustion in the sector Manufacturing industries and Construction in the early 90s was given by the depression and re-structuring of several industrial branches, at the end of the monitored period the emissions decreased due to saving policy and implementation of new technologies. The emission reduction in Other sectors is the result of more effective energy use (growing energy efficiency, mainly thermo-insulation of buildings and economical use of energies). On the contrary the situation in the sector Transport is quite different; the emissions increased 2.5 times as compared with the year 1990, which is given by the development of transport, mainly of individual automobile transport and road truck transport. The CO₂ emissions development was positively influenced by the decreasing share of solid fuels and by the growth of the share of natural gas, and beginning from 2003 also by the use of biomass. During the recent years, however, the gas prices have markedly increased, which in some localities resulted in the switch to other type of fuels.

CH₄ – methane
Anthropogenic methane emissions in the Czech Republic have their origin mainly in mining, processing and distribution of fuels; this type of source is called a fugitive source. Other significant methane emission sources are as follows: animal breeding, anaerobic decomposition of biowaste during landfilling and treatment of waste water. There is one highly important source of methane emissions at international level, and namely rice growing. Methane is created in animal breeding during digestion processes (mainly in cattle) and during decomposition of manure.

Methane is the second significant greenhouse gas with regard to the production in the Czech Republic. Its share in total aggregated greenhouse gases emissions has decreased from 9.8 % in 1990 to 8.0 % in 2007. The amount of methane emissions produced by different activities is presented in Fig. I.2.2. In 1990–2007 the methane emissions decreased by 36.0 %, which was caused mainly by the reduction of coal mining and of the livestock numbers, to a lesser extent also by lower consumption of solid fuels in households. The increase of emissions in the Waste sector is reduced by the use of landfill gas or biogas for energy production.

N₂O – nitrous oxide
The largest amount of nitrous oxide emissions has its origin in agricultural activities, mainly in denitrification of nitrogen supplied to the soil in artificial fertilizers or manure and other organic material. The production of nitric acid is another major source and, to a lesser extent, also Transport sector (cars with catalytic convertors).

The share of methane in total aggregated GHG emissions has decreased from 6.2 % in 1990 to 5.0 % in 2007. The amount of emissions of this greenhouse gas produced by individual activities is shown in Fig. I.2.3. In 1990–2007 nitrous oxide emissions decreased by 36.9 %, mainly as a result of the reduction of artificial fertilizers in agriculture, the decrease of the livestock numbers and recently also due to the implementation of technologies aimed at N₂O emissions abatement in the production of nitrous acid.

Fluorinated gases
The share of the fluorinated gases (F-gases) in total aggregated emissions increase as compared with the year 1995, set as the base year with regard to the Kyoto Protocol, from 76 to 1 702 kt CO_2eq. in 2007. Similarly, the share in total aggregated emissions has increased as well (from 0.1 % in 1995 to 1.1 % in 2007). Fluorinated gases are not produced in the Czech Republic and all their consumption is covered by import. They are used mainly in the refrigeration and air conditioning equipments (mainly HFCs), in electrical equipments (mainly SF₆), and in a number of other branches (e.g. as sound-proof windows, plasma etching, fire extinguisher charges, aerosol propellants, blowing agents). The growth of emissions from fluorinated gases is caused by their use as substitutes for substances depleting the Earth�s ozone layer (CFC, HCFC – mainly as refrigerants), large-scale use of modern technologies (air conditioning) and the production specialization in the Czech Republic (production of cars, the filling of air conditioning systems). In some cases, e.g. in sound-proof windows, plasma etching and blowing agents, the used amount has stagnated or decreased, which is connected with the implementation of the new technologies and/or the use of substitutes. The year-to-year growth of 2006–2007 is caused by the launching of new manufacturing industries of refrigerating and air conditioning equipments.
The sum of F-gases emissions in the period 1990–2007 is presented in Fig. I.2.4.

More detailed data on GHG emissions and removals in the Czech Republic are presented at the CHMI website or in the National Inventory Report of the Czech Republic⁴. Similar information from all EU states is regularly collected and published by EEA as reports⁵ and in interactive internet database⁶.

Emission trading system
The greenhouse gas emission (CO₂) allowance trading scheme is regarded as an effective economic tool for the reduction of GHG emissions. At present there are two integrated systems in the Czech Republic – The European Union Emission Trading Scheme (EU ETS) and flexible mechanisms of the Kyoto Protocol: Clean Development Mechanism, Joint Implementation and International Emission Trading.

CHMI takes an active part in both systems. The CHMI experts have participated from the very beginning in the preparation and implementation of the EU ETS in the Czech Republic, mainly as concerns the methods (monitoring, reporting and verifying greenhouse gases emissions). The interaction of the national GHG emissions inventory and EU ETS has a mutual character: national inventory brings several data for emission calculation from selected processes and, on the other hand, the selected data obtained within the EU ETS are used when processing the national inventory.

As concerns the use of flexible mechanisms, the implementation and operation of the National inventory system is the fundamental and inevitable condition for the possibility to use the International emission trading. As for the Joint Implementation projects, this results in a markedly lower administrative burden, and consequently, lower costs for their implementation.

In 2008 the amount of emissions produced by the Czech enterprises involved in EU ETS was by 8.3 % lower than in the previous year. The 2008 emissions amounted to 80.5 Mt CO₂, which is a markedly lower value than expected by the National Allocation Plan for the Czech Republic with 85.8 million allowances for the year 2008.

It cannot be determined without the detailed analysis, whether the emission reduction is the result of the change in the monitoring and reporting methods, investments and the use of more effective technologies, or whether it was caused by the economic crisis. With regard to the results of production statistics it can be concluded that the main causes are the economic crisis and the subsequent drop in productions.

However, it can be expected that the decrease of total GHG emissions in the Czech Republic in 2008 will not be as large as in EU ETS because this scheme covers only the selected part of the national economy and emission. Other sectors, e.g. Transport or heating in residential and institutional buildings have different (time) response to the current crisis, as well as different driving factors.

Tab. I.2.1 Total emissions of greenhouse gases, 1990–2007 [Mt CO_{2 eq.}]

Tab. I.2.2 Emissions of greenhouse gases structured by sectors, 1990 to 2007 [Mt CO_{2 eq.}]

Tab. I.2.3 Emissions of CO₂ verified and reported in the ETS scheme, 2005–2008 [Mt CO_{2 eq.}]

Fig. I.2.1 Emissions of carbon dioxide structured by sectors, 1990–2007

Fig. I.2.2 Emissions from facilities coming under EU ETS in 2008

Fig. I.2.3 Emissions of methane structured by sectors, 1990–2007

Fig. I.2.4 Emissions of nitrous oxides structured by sectors, 1990–2007

Fig. I.2.5 Emissions of F-gases, 1995–2007

¹ IPCC, 2007: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K.B., Signor, M. and Miller, H.L. (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 996 pp.
IPCC 2006, 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Prepared by the National Greenhouse Gas Inventories Programme, Eggleston, H.S., Buendia, L., Miwa, K., Ngara, T. and Tanabe, K. (eds). Published: IGES, Japan.

² Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories, Vol. 1–3, IPCC 1997
Good Practice Guidance and Uncertainty Management in National GHG Inventories, IPCC 2000
Good Practice Guidance for Land Use, Land-Use Change and Forestry, IPCC 2003

³ by 2005/166/EC Commission Decision laying down rules implementing Decision No. 280/2004/EC of the European Parliament and of the Council of 11 February 2004 concerning a mechanism for monitoring Community greenhouse gas emissions and for implementing the Kyoto Protocol

⁴ nis_uv_aj.html

⁵ Annual European Community greenhouse gas inventory 1990–2007 and inventory report 2009
http://www.eea.europa.eu/publications/european-community-greenhouse-gas-inventory-2009

⁶ Greenhouse gases emissions and Global Warming Potential (GWP)
http://dataservice.eea.europa.eu/pivotapp/pivot.aspx?pivotid=465