Being a Party to the Montreal Protocol and the Kigali Amendment, Togo has made a commitment to phase out its Ozone Depleting Substances (ODS) and their substitutes according to well-defined timetables. The country therefore needs to inventory its emissions in order to determine the progress made. To support Togo in this process and contribute to the preservation of the ozone layer, this thesis study aims to analyze the status and trends of Togo's emissions in ODS and ODS substitutes for the time series 1995-2018. The methodology used is that recommended in the Montreal Protocol guidelines on data collection and analysis as well as on ODS estimates. Based on the parameters and emission rates obtained after a field survey, the calculated emissions are closer to the actual emissions. Thus, emissions of ODS and their substitutes in 2018 in Togo are respectively estimated at 121.631 Gg CO2-e and 641.409 Gg CO2-e. From 1995 to 2018, trends in CFC-11 and CFC-115 emissions experienced annual growth rates of -4.17% while the decline in CFC-12 emissions was around -4.13% and that HCFC-22 emissions were growing annually at a rate of 4.16%. As for the HFCs which were only introduced in 2013 in Togo, the trends in their emissions are estimated at nearly 31.4% compared to 1995. From these results, it appears that CFCs are completely replaced by HCFCs and HFCs whose emissions are increasing sharply. Togo will have to further strengthen surveillance of illicit imports of ODS at its borders and strengthen the capacity of refrigeration technicians who release significant F-gases into the atmosphere.

Greenhouse effect, which contributes to the climate warning, is a mechanism that occurs in the lower atmosphere because of the presence of Greenhouse Gas (GHGs). Its reinforcement by the emissions of anthropogenic greenhouse gases has harmful consequences on the climate. Togo, a developing country, contributes more to this reinforcement by the emissions related the socio-economic activities due to the Agriculture, Forestry and Other Land Use (AFOLU) area. We carried out these inventories of Greenhouse Gas in accordance with the IPCC Guidelines for National Greenhouse Gas Inventories, version 2006, using CCNUCC software for the national inventories of GHGs. In 2004, basic year selected, based on the quality of the data, the Agriculture subsector emitted 2407.88 Gg CO₂-e of direct GHGs (CH₄, N₂O) and 252,72 Gg of GHGs precursors (NO_x, CO). In Togo, these emissions have a tendency to increase passing the aggregated emissions from 2085.89 Gg CO₂-e in 1990 to 2526.22 Gg CO₂-e in 2008. The assessment of key categories of national emissions gave the priority to the biomass of cropland remaining cropland followed by biomass of forest land converted to cropland. These estimations will enable policy makers to take right decisions in matters of mitigation and adaptation and use them as baselines for calculations of carbon credits.