This diploma thesis deals with global environmental agreements and their effectiveness. Its aim is to disclose the causes of success of some agreements and, on the contrary, the motives of failure of other agreements. In the theoretical part, the specialities of the environmental problems are illustrated, followed by the introduction to the international environmental law and agreements. In the practical part, two well-known international agreements concerned with atmosphere are compared. They deal with similar problem, but they achieved very different results. The objective of step-by-step comparison of diverse aspects of both agreements is to discover what factors caused the great success of the Montreal Protocol in protecting the ozone layer and why the similarly conceived Kyoto Protocol failed in the combat against climate change. Last chapter concludes this comparison and defines key characteristics which are essential for the effectiveness of the global environmental agreements.

Les forestiers ont besoin d'outils permettant de cartographier les essences, la hauteur, la structure ou la biomasse des peuplements. Même si le lidar aéroporté (light detection and ranging, détection et télémétrie par laser) ne permet pas de mesurer l'ensemble de ces variables, il permet d'accéder aux hauteurs et à la biomasse de manière rapide, précise et surtout spatialisée sur de grandes surfaces. Cependant, les lidars aujourd'hui utilisés en forêts n'ont pas été conçus spécifiquement pour étudier la végétation, et l'ajustement de leurs caractéristiques techniques est supposé permettre d'améliorer la précision des mesures. L'objectif de cette thèse est de déterminer des configurations de capteurs lidars dédiés à l'étude de la végétation forestière, et de proposer des méthodes d'extraction de paramètres forestiers adaptés aux différentes configurations. La capacité de différentes résolutions (taille d'empreinte et échantillonnage spatial), longueurs d'onde et modes d'enregistrement du signal retour à mesurer des paramètres forestiers (hauteurs et densité d'arbres, taille des couronnes et indirectement volume et biomasse) a été évaluée. Les études ont été menées de l'échelle de l'arbre jusqu'à celle du peuplement, sur des données expérimentales ou simulées. Dans une première partie, des méthodes de traitement de données lidars aéroportés classiques (scanneur, largeur du faisceau décimétrique, 5 mesures/m², laser proche infrarouge) ont été développées pour estimation la biomasse d'arbres individuels. Dans cette étude, l'apport de nouvelles données dites "full-waveform" (enregistrement du signal complet) a été démontré par rapport aux traditionnelles données multiéchos (extraction des échos les plus significatifs). Dans une seconde partie, une expérimentation avec un prototype lidar du Commissariat à l'Énergie Atomique (CEA) embarqué sur un ULM a été réalisée (profileur, largeur de faisceau de 2,4 m, espacement de 2,4 m entre deux mesures successives le long de la ligne de vol, laser ultraviolet). Sans permettre des mesures d'arbres individuels, cette configuration de capteur a permis d'étudier les variations de la structure des arbres à l'intérieur d'une placette forestière (30 m de diamètre). En validant l'utilisation d'un laser ultraviolet pour l'étude de la végétation, les résultats de cette expérience permettent d'envisager le développement de capteurs bifonctions atmosphère/végétation. Dans une troisième partie, des signaux lidars à larges empreintes (plusieurs dizaines de mètres au sol) ont été simulés par agrégation de signaux lidars aéroportés classiques. Une méthode de modélisation permettant d'étudier la dynamique supposée d'un signal lidar satellitaire dans différents types de forêts a été proposée. Elle apporte des informations utiles à la calibration de l'énergie à émettre pour une future mission satellitaire dédiée à la cartographie de forêts. Le principal problème avec les données à larges d'empreintes est la forte influence de la topographie sur la précision des mesures de hauteurs d'arbres en zones pentues. En conséquence, une méthode de correction de cet effet a été élaborée, permettant ainsi de mesurer les hauteurs d'arbres avec une précision jusqu'alors inenvisageable. Cette méthode a de plus ouvert de nouvelles perspectives dans l'estimation de la topographie sous la forêt, à partir de données lidars à larges empreintes. / Foresters need tools to map the tree species, tree heights, stand structure and biomass. Although the airborne lidar (Light detection and ranging) technology does not give access to all these variables, it can provide quick, accurate and spatially explicit measurements of tree heights and biomass over large surfaces. However, lidar systems currently used have not been specially designed to performed vegetation studies. The adjustment of the technical characteristics of such systems is expected to improve the accuracy of retrieved forest parameters. Consequently, the objective of this thesis is to determine configurations of lidar sensors dedicated to the study of forest vegetation, and to propose methods designed to extract forest parameters depending on the different configurations. The ability of different resolutions (footprint size and spatial sampling), wavelengths and sampling modes of the backscattered signal to measure forest parameters (canopy height and density, crown size and also volume and biomass) was evaluated. The studies were conducted from tree to stand level, on experimental or simulated data. In a first part, we developed methods to process classic airborne lidar data (scanner system, tens of centimeter footprint, 5 measurements/m², near-infrared laser) for the estimation of the biomass of individual trees. In this study, we demonstrated the contribution of new data called "Full-waveform" (recording the entire signal) compared to traditional multi-echoes data (extraction of the most significant echoes). In a second part, we performed an experiment using a Comissariat of Energy Atomique (CEA)'s lidar prototype onboard an ultra-light aircraft (profiler system, 2.4 m footprint, 2.4 m spacing between two measurements along the flight line, ultraviolet laser). Such a configuration did not allow to measure individual trees, but we were able to study variations in forest structure at the plot level (30 m diameter). Having demonstrated the ability of an ultraviolet lidar to perform vegetation studies, this sensor opens the way to the development of bi-functional lidar for both atmosphere and vegetation remote sensing. In a third part, large footprint lidar signals (tens of meters on the ground) were simulated from the aggregation of classical airborne lidar signals. We proposed a method for modeling the signal dynamics of satellite lidars in different forest types, in order to calibrate the energy to emit for a future space-borne mission. The main problem with large-footprint size is the strong influence of topography on accurate measurements of tree heights in steep areas. We consequently developed a method to correct this effect, thus increasing the accuracy of tree height retrieval. This approach also opened new perspectives in topography assessment from large-footprint data in forest environments.

This thesis evaluates why the implementation of a tree plantation project in Chiapas, Mexico, called Scolel Te failed in its attempt to participate in the CDMs scheme. The Scolel Te project brings together farmers and local organisations into a network of exchange of resources that aims at producing an outcome that is only possible through the co-ordination and co-operation of all participants: the emission of carbon certificates. This thesis studies the co-ordination problems that local actors face at the moment of establishing the carbon projects by identifying how formal and informal mechanisms such as contracts, economic incentives, trust, and reputation, create or solve co-ordination problems in the Scolel Te network. The thesis also describes how changes in the distribution of power among actors affect the functioning of the network and how individual's interests and strategic alliances have the potential of derailing the aims of the environmental project. For such purposes, this thesis analyses the exchange relationships among actors at the micro level and identifies how exchange relationships evolve over time. Then an overall picture of the exchange relationships is presented (macro level) with focus in understanding how and why power in the network is exerted. Findings suggest that relying on economic incentives as the main mechanism to generate commitment among communities has failed to create stable exchange relationships in the long term. Trust and reputation are stronger mechanisms to achieve commitment. Moreover, we find that the ability to generate commitment depends highly on the generation of interdependencies between tree plantation projects and the main economic activities of local actors. However, type of land tenure, main economic activity, and pre-existing power relationships embedded at local level are also the principal factors that determine the dynamism of the social exchange relationships and commitment in the long-run. This thesis considers that co-ordination failure occurs because a lack of knowledge about the real dependencies between local actors and their natural resources in the design of CDMs. At macro level, this thesis found that the lack of accountability of the unregulated local carbon market at local level has created unintended incentives for actors to adopt less environmentally responsible strategies and disincentive participation in the CDMs.

This master thesis seeks to explain the approach and position of developing countries in international politics on climate change, focused on specific groups of developing countries within the Group 77. First chapter explain the roots and development of climate change politics, together with the need to combat the climate change. Second chapter lays down the theoretical principles of attributing commitments to developing countries and analysis the position of different groups of developing countries. The last chapter is devoted to the case study of China's stance to international climate change regime and factors that influence its position.

In 1997, both the United States (U.S.) and the European Union (EU) signed the Kyoto Protocol, the first legally binding international treaty with targets for greenhouse gas emissions reductions. However, in 2001, the United States withdrew from the Protocol. This thesis seeks to understand some of the reasons why the European Union embraced the Kyoto Protocol while the United States did not. Using an overall framework of comparative politics, research is undertaken through three lenses. First, an overview of public opinion toward global warming and climate change in the U.S. and the EU analyzes potential differences or similarities from surveys carried out in each area. Second, I examine the prevailing political ideology in each polity, with emphasis on the period when climate change arose as a major global challenge. Finally, two case studies examine the theory of environmental federalism and how it might affect climate change policy action. I obtained the following results. Public opinion research has revealed that, on average, the American public is nearly as concerned with climate change as the European public. However, the overarching political ideology in the U.S. was one of conservatism, while that in Europe was one of social democracy, with left and center-left governments, contributing to a greater or lesser degree, and through indirect mechanisms, to the political stances adopted. Finally, the case of Germany shows that member state actions, such as the implementation of ambitious reductions targets, can still play a crucial role in leadership even in the presence of action at the central government level (EU). The California case study shows that state-level efforts can rise to fill a vacuum created by the absence of central government action. In the end, behavior of each polity regarding international climate agreements, particularly the Kyoto Protocol, cannot be explained in simple terms.; The complexity of the issues revolving climate change require further interdisciplinary research and collaboration among multiple actors including scientists, policymakers, nongovernmental organizations, and other stakeholders.

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Föreliggande studie tillämpar diskursanalys i syfte att förstå var det råder samstämmighet eller konflikt kring huruvida Sverige ska sälja, spara eller annullera överskottet på utsläppsrätter inom EU:s och FN:s utsläppshandel. Genom kritisk diskursanalys har vi kategoriserat och kodat tio riksdagsdebatter mellan åren 2010 och 2014, i vilka en ekologisk diskurs och en ekonomisk diskurs kämpar om tolkningsföreträde. Bortsett från samstämmigheten att handel med utsläppsrätter – vilken kan ses som ekologisk modernisering – är ett viktigt verktyg för att minska klimatförändringar; råder öppen kamp kring hur ett överskott på utsläppsrätter ska hanteras. Kampen har delats in i sju kategorier baserat på huruvida: 1) ett beslut om annullering kan tas direkt eller om det krävs en utredning först, 2) en annullering är en symbolisk handling eller styrs av marknadens logik, 3) en försäljning leder till ökade utsläpp, 4) på vilket sätt överskottet ska fungera som förhandlingsstrategi under klimatmöten, 5) Sverige förlorar sitt klimatanseende vid en försäljning av överskott på utsläppsrätter, 6) utsläppshandeln i högre grad borde styras av politiker eller marknadsmekanismer, och slutligen 7) huruvida överskott på utsläppsrätter bör ses som ett lyxproblem. Eftersom det ännu inte finns en fixerad diskursiv entydighet angående hur överskott på utsläppsrätter ska hanteras, menar vi att ingen av diskurserna kan ses som helt hegemonisk. Den ekonomiska diskursen har dock patent på rationaliteten eftersom den, till skillnad från den ekologiska diskursen, har accepterat ekomodernismen. Om den ekonomiska diskursen blir hegemonisk är det sannolikt att ytterligare överskott på utsläppsrätter säljs.Nyckelord: klimatförändringar, EU-ETS, Kyotoprotokollet, ekologisk modernisering, diskursiv kamp. / The following study uses insights derived from discourse analysis to examine whether there is consensus or conflict regarding if Sweden should sell, save or invalidate the surplus of allowances within the emissions trading systems of the EU and the UN. Through critical discourse analysis, we have categorized and coded ten parliamentary debates between the year of 2010 and 2014, in which an ecological discourse and an economic discourse can be derived. Aside from the consistency that the emissions trading systems – which can be seen as ecological modernization - is an important tool to mitigate climate change; an open struggle can be seen regarding how a surplus of allowances should be governed. The struggle has been divided into seven categories based on whether: 1) a decision of invalidation can be taken directly or if an investigation is necessary, 2) an invalidation is a symbolic act or controlled by the logic of the market, 3) a sale directly leads to an increased amount of emissions, 4) in what way the surplus of allowances should serve as a negotiating strategy during international climate meetings, 5) Sweden’s climate profile will be lost in case of a sale, 6) the emissions trading systems to a higher rate should be controlled by politicians or mechanisms of the market, and finally 7) whether the surplus of allowances should be seen as a luxury problem. Since there is not yet a fixed unity regarding how surplus of allowances should be governed, we argue that none of the discourses can be seen as completely hegemonic. However, the economic discourse have positions on rationality due to that it, unlike the ecological discourse, has accepted the ecological modernisation. If the economic discourse becomes hegemonic it is likely that additional surplus of allowances will be sold.Key words: climate change, EU-ETS, the Kyoto Protocol, ecological modernisation, discursive struggle.

There is an increasing focus on environmental conservation worldwide, evidenced by such events as the signing of the Kyoto Protocol by developing countries, and by consumers becoming more environmentally conscious. The purpose of this study was to investigate how government could, through tax law, incentivise businesses to invest in environmental conservation. One of the major South African industries contributing to the GDP is the wine industry. South Africa, new in world wine production, is ranked among the top 10 wineproducing countries, together with countries such as Australia. The average foreign consumer is more environmentally conscious, which means that South African wineries also have to become environmentally aware to ensure that their products are competitive in the foreign markets. A negative aspect of investing in environmental conservation is that a substantial upfront capital investment is normally required, which could lead to wineries not investing unless they can see a significant benefit as a result. Given this, the purpose of this study was to determine whether or not there is an income tax benefit for wineries when investing in environmental conservation in terms of the Income Tax Act no.58 of 1962 (hereafter “the Act”). Government can, through tax law, either reward people for doing the right thing or punish them by imposing taxes for doing the wrong thing. The sections of the Act that have been identified as incentivising environmental conservation are Sections 11D, 12B, 12K, 12L, 37B and 37C, all with specific requirements before the incentives can be used. The study contains an analysis of the type of environmental conservation that wineries can carry out and considers whether those conservation activities would enable them to use the incentives stated in the Act. Some of the environmental conservation activities identified that wineries could perform include the use of solar power to minimise their energy consumption, thereby reducing their impact on the environment. Further, there are industrial codes which encourage recycling and waste management, certain aspects of which would enable a winery to use some of the sections in the Act. The incentives available in the Income Tax Acts of other wine-producing countries, such as France, Australia and the Oregon state in the USA, were also reviewed to see how the incentives in their Acts compare with those in the South African Income Tax Act. Lastly, a limited empirical study was conducted to determine the wineries’ perspective in respect of the incentives indicated in the Act and whether or not they find that the incentives encourage them to carry out further environmental conservation. / MCom (South African and International Taxation), North-West University, Potchefstroom Campus, 2015

There is an increasing focus on environmental conservation worldwide, evidenced by such events as the signing of the Kyoto Protocol by developing countries, and by consumers becoming more environmentally conscious. The purpose of this study was to investigate how government could, through tax law, incentivise businesses to invest in environmental conservation. One of the major South African industries contributing to the GDP is the wine industry. South Africa, new in world wine production, is ranked among the top 10 wineproducing countries, together with countries such as Australia. The average foreign consumer is more environmentally conscious, which means that South African wineries also have to become environmentally aware to ensure that their products are competitive in the foreign markets. A negative aspect of investing in environmental conservation is that a substantial upfront capital investment is normally required, which could lead to wineries not investing unless they can see a significant benefit as a result. Given this, the purpose of this study was to determine whether or not there is an income tax benefit for wineries when investing in environmental conservation in terms of the Income Tax Act no.58 of 1962 (hereafter “the Act”). Government can, through tax law, either reward people for doing the right thing or punish them by imposing taxes for doing the wrong thing. The sections of the Act that have been identified as incentivising environmental conservation are Sections 11D, 12B, 12K, 12L, 37B and 37C, all with specific requirements before the incentives can be used. The study contains an analysis of the type of environmental conservation that wineries can carry out and considers whether those conservation activities would enable them to use the incentives stated in the Act. Some of the environmental conservation activities identified that wineries could perform include the use of solar power to minimise their energy consumption, thereby reducing their impact on the environment. Further, there are industrial codes which encourage recycling and waste management, certain aspects of which would enable a winery to use some of the sections in the Act. The incentives available in the Income Tax Acts of other wine-producing countries, such as France, Australia and the Oregon state in the USA, were also reviewed to see how the incentives in their Acts compare with those in the South African Income Tax Act. Lastly, a limited empirical study was conducted to determine the wineries’ perspective in respect of the incentives indicated in the Act and whether or not they find that the incentives encourage them to carry out further environmental conservation. / MCom (South African and International Taxation), North-West University, Potchefstroom Campus, 2015