Search results for "EMISSIONS"
showing 10 items of 294 documents
Environmental effects and potential impact on human health caused by the recent Nyiragongo eruption (Democratic Republic of Congo)
2022
Volcanic activity emits large amounts of gases and particles to the atmosphere subsequently spreading contaminants to rain, surface waters and soils, negatively impacting on the environment and the human health. The recent eruption of Nyiragongo occurred on 22nd of May, injected large quantities of ash affecting the environment of the Virunga area, and more than 2 million people living between 18-25 km far from the main crater of Nyiragongo. Several studies demonstrated that drinking waters and plants may contain high contents of natural pollutants, and when ingested they become harmful to human health causing acute or chronic diseases. In this study, we investigated the impact of the recen…
EMISSION FACTORS, VEHICLE MODAL ACTIVITY AND ROAD OPERATIONS. A MESOSCOPIC APPROACH
2009
Current studies underline that vehicle emissions are highly linked to modal vehicle activity and a modal approach to traffic-related air quality modeling is suitable to estimate mobile source contribution to air quality. Pollutant emissions depend on characteristics of vehicles in traffic flow and on road operating conditions predictable after the implementation of the road project; then, the usual emission rate models do not predict properly the on-road vehicles emissions of modal traffic events, such as those ones occurring at intersections. Moreover modal activity analysis carried out at micro scale level, as required by modal emission models, will be still necessary to value reliable em…
Comment réduire les émissions de CO2 du transport de fret en France ? Evaluation socio-économique de trois politiques publiques
2018
France must implement voluntarist policies in order to reduce CO2 emissions, which raises questions regarding the effectiveness of competing options and their costs, for both public finances and society. This paper estimates abatement costs of one ton of CO2 from three scenarios aimed at softening the environmental impacts of freight moved by trucks. Hybrid trucks may generate large CO2 savings (5.7 Mt/year in 2030), at a moderate discounted abatement cost (88 €/t). The option based on natural gas for vehicles leads to a similar abatement cost and to lower environmental gains (3.2 Mt/year in 2030). Whilst inducing small CO2 savings (0.2 Mt/year in 2030), megatrucks present a negative discou…
The Spanish Turn against Renewable Energy Development
2018
[EN] In this study, we focus on the case of Spanish energy policy and its implications for sustainable energy development. In recent years, Spanish legislation has changed dramatically in its approach to sustainable energy sources. This change is despite EU and international efforts to increase energy efficiency, and to accelerate the transition to renewable energy sources (RES) in order to reduce greenhouse gas emissions. Based on the socio-technical transitions literature, this paper assesses the role of the new legislation in this altered scenario, and analyzes the evolution of energy production in Spain in the EU context. The results are triangulated with two expert assessments. We find…
Unwanted effects of European Union environmental policy to promote a post-carbon industry. The case of energy in the European ceramic tile sector
2016
Global warming combined with low carbon transition plans is threatening the future of high energy consumption industry sectors in the European Union (EU). The need to respond to environmental challenges is demonstrated by support for international level energy policies and legal requirements, such as the Kyoto Protocol which the EU supports, and increased EU-level environmental legislation and energy policies. The effect of these initiatives is gradually transforming industrial activities in the EU. However, since not all countries have adopted these policies, evaluation of their net effect needs to take account also of side-effects such as delocalization of industry activity and the legal …
The timeline of trading frictions in the European carbon market
2012
We evaluate the quality of prices of EU-ETS, the most active European derivative market for greenhouse gas emissions allowances (EUAs). So far, this market has had two phases, a trial phase (from 2005 to 2007) and a commitment phase (from 2008 to 2012). The true value of a trial-phase EUA at the beginning of 2008 was inevitably zero because it could not be used in the commitment phase to cover emission targets. However, continued rumors of over-allocation of EUAs led to an early collapse of the market by May 2007. We study whether this market breakdown and the subsequent outbreak of the international financial crisis had a persistent effect on the quality of the commitment phase. We provide…
Two alternate means to internalize companies' CO2 emissions: Carbon Value Added and Profitability
2022
Eiropas Savienības CO2 emisijas kvotu tirdzniecības sistēma un Latvijas tautsaimniecības ilgtspējīga attīstība
2013
ANOTĀCIJA Promocijas darba mērķis ir, balstoties uz datiem par Eiropas Savienības Emisijas kvotu tirdzniecības sistēmas (ES ETS) darbību Latvijā un ES ETS integrētību Latvijas tautsaimniecības politikā, mikro un makro līmenī izpētīt ES ETS līdzšinējo ietekmi uz Latvijas tautsaimniecības ilgtspējīgu attīstību. Pētījuma ietvaros autore izstrādājusi modeli lēmuma pieņemšanai par tiešo dalību atļauju tirdzniecībā, formulējusi stratēģijas tiešajai dalībai atļauju tirdzniecībā, izvērtējusi ES ETS integrētību Latvijas tautsaimniecības ilgtspējīgas attīstības politikā, novērtējusi ES ETS ietekmi uz Latvijas ES ETS dalībniekiem, izanalizējusi Latvijas ES ETS dalībnieku zināšanas un izpratni par ES E…
Energy management strategy to reduce pollutant emissions during the catalyst light-off of parallel hybrid vehicles
2020
Abstract The transportation sector is a major contributor to both air pollution and greenhouse gas emissions. Hybrid electric vehicles can reduce fuel consumption and CO2 emissions by optimizing the energy management of the powertrain. The purpose of this study is to examine the trade-off between regulated pollutant emissions and hybrid powertrain efficiency. The thermal dynamics of the three-way catalyst are taken into account in order to optimize the light-off. Experimental campaigns are conducted on a spark-ignition engine to introduce simplified models for emissions, exhaust gas temperature, catalyst heat transfers and efficiency. These models are used to determine the optimal distribut…