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Nombre de programmes trouvés : 208
Label UNT Documentaires

le (15m46s)

Le massif central de l'Itasy

Madagascar, non loin de Tananarive, perchée à plus de 1200 mètres sur les plateaux de l’Imerina, se trouve une région beaucoup moins connue, à l’écart des principaux axes de communication. Sculpté au quaternaire par de fortes poussées magmatiques, aujourd’hui en sommeil, l’ITASY est un des massifs volcaniques les plus récents de Madagascar. Seule manifestation de ces forces souterraines, en bordure de la rivière Massy, des geysers crachent l’eau des profondeurs. Au beau milieu des dômes et des lacs, la vie des hommes s’organise , tourisme, pêche mais avant tout agriculture font la richesse de cette région, aujourd’hui devenue l’un des ...
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le (56m8s)

Les énergies demain ?

Quel avenir pour l’énergie… et pour l’automobile ?Le développement des pays émergents engendre une demande croissante en énergies sur le plan mondial.Cette demande suscite beaucoup de questionnement.Quelles sont les réserves énergétiques disponibles ou potentielles ?Quelle part devront assurer les différentes sources d’énergie ?Quelles solutions pour limiter les émissions de gaz à effet de serre ?Quelles politiques énergétiques envisageables pour la France ?
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Conférences

le (36m2s)

Linking Adaptation and Mitigation for Climate Risk Reduction

How people privately and collectively adapt to climate risk can affect the costs and benefits of public mitigation policy (e.g., Kyoto); an obvious point often neglected in actual policy making. Herein we use the economic theory of endogenous risk to address this optimal mix of mitigation and adaptation strategies, and examine how increased variability in climate change threats affects this mix. We stress that a better understanding of the cross-links between mitigation and adaptation would potentially make it possible to provide more risk reduction with less wealth. Policies that are formulated without considering the cross-links can unintentionally undermine the effectiveness ...
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Conférences

le (10m57s)

Food demand, Productivity Growth and the Spatial Distribution of Land and Water use: A Global Modelling Approach

Nowadays, human society appropriates about one quarter of total net primary production of the terrestrial biosphere. Production of food, energy and materials, and the related use of land and water account for crucial components and interactions in the Earth System. However, rising food, energy and material demand, climate change and ambitious mitigation policies will enhance the competition for land and water. While the combined impacts of these drivers are still highly uncertain, global land-use patterns will change in the future, reacting to these pressures. Projecting their future development is important to study both, their impacts on the Earth System as ...
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Conférences

le (15m0s)

Climate, Geography and Macroeconomics: Revised Data, Refined Analysis and New Findings

Assessments of social and economic impacts of climate change are primarily based on the results of biophysical climate impact models, which are aggregated, extrapolated and/or valued in monetary terms. Another potential source of information on climate impacts are spatial and/or temporal analogues, such as Ricardian analysis of climate impacts on agriculture. Another recent effort to this end involves the development of the G-Econ database (Nordhaus, 2006), which describes the relationship between climatic and geographic factors on the one hand and regional economic productivity on the other. A multivariate regression derived from this database has been used to estimate global economic ...
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le (35m28s)

Industrial and Environmental Policies: Reciprocal Impacts

Total as a key player of the Oil and Gas industry is providing answers to 25 environmental challenges. In that respect, it has already developed environmental objectives and policies. Its environmental footprints is being assessed, controlled and reduced with a set of concrete means to improve its performance, a better selection of major challenges and a better report to external stake holders. Energy and climate issues are inextricably interwoven, which means that we have to help to reconcile the objectives of today’s society, pursuing economic growth while protecting the climate for future generations. Faced with this predicament, we are ...
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le (10m37s)

Turning Hazards into Ressources? Climate Change, Floods and Coastal Wetlands in the Costa Brava (North-East Iberian Peninsula)

According to the IPCC Fourth Assessment, one of the most vulnerable areas in Europe are coastal zones. This is due to sea level rise combined with increased risks from storms. Coastal wetlands, in particular, are projected to be negatively affected by sea-level rise especially where they are constrained on their landward side, and lack sediment supply. Approximately 20 percent of existing coastal wetlands may disappear by 2080 because of the expansion of the sea. Mediterranean low-lying sedimentary coasts with highly diverse ecosystems appear to be the most vulnerable areas to this phenomenon. The 4th IPCC Report also warns about the ...
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le (15m10s)

Social Impact of global Environmental Change on Farming Communities on the Ogoli River Bank in Otukpo Area of Benue State, Nigeria

One of the manifestations of the global change in this study area is a marked reduction in the duration and amount of rainfall. This adversely affects the volume of the head waters that ultimately determine the volume of the Ogoli River which is used for irrigation. Consequently, food security and livelihood of the farming communities whose mode of agricultural production is rain-fed is adversely affected. Using Participatory Learning Action (PLA) technique involving three distinct groups of adult male, adult female and youth, the study seek to evaluate the coping mechanisms of these vulnerable group to draught and reduced volume of ...
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le (11m20s)

The Effect of Thermal Pollution on Benthic Foraminiferal Assemblages, in the Mediterranean Shore Face Adjacent to Hadera Power Plant (Israël)

Over the past several decades public and scientific awareness to global warming has increased significantly. As a result, many studies have examined the affects of global warming. However, the consequences of global warming on marine living organisms at the Levantine basin of the East Mediterranean has not yet been explored. In this study, we have used the thermal pollution of a power plant at the Mediterranean coast of Israel as an analog for the expected future trend of sea surface temperature (SST) rise. We have performed a sequence of 11 sampling campaigns at 5 stations located along a temperature gradient ...
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