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Carmen Difiglio

Bio: Carmen Difiglio is an academic researcher from International Energy Agency. The author has contributed to research in topic(s): Greenhouse gas & Green vehicle. The author has an hindex of 3, co-authored 3 publication(s) receiving 1727 citation(s).

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Abstract: Technology policies are one of the options available for the reduction of carbon emissions and the usage of energy. However, gains in the efficiency of energy consumption will result in an effective reduction in the per unit price of energy services. As a result, consumption of energy services should increase (i.e., “rebound” or “take-back”), partially offsetting the impact of the efficiency gain in fuel use. Definitions of the “rebound” effect vary in the literature and among researchers. Depending on the boundaries used for the effect, the size or magnitude of this behavioral response may vary. This review of some of the relevant literature from the US offers definitions and identifies sources including direct, secondary, and economy-wide sources. We then offer a summary of the available empirical evidence for the effect for various sources. For the energy end uses for which studies are available, we conclude that the range of estimates for the size of the rebound effect is very low to moderate.

1,709 citations

Journal ArticleDOI
01 Jul 2000-Energy
Abstract: This paper presents an analysis of alternative policies and measures for reducing greenhouse gas (GHG) emissions in the US light-duty vehicle sector to specified levels by 2010 and beyond (to 2030) Although the Kyoto treaty does not require specific reductions in each sector, the authors consider the likelihood that light-duty vehicles can “pull their weight” relative to other sectors The authors use economic relationships between fuel prices, travel, and vehicle fuel economy to estimate the effect of different GHG policies The estimated GHG savings from a number of travel-related and vehicle-related policies are compared to reductions that would be needed in order to achieve Kyoto-type reductions in the sector by 2010 The authors find that, apart from an unrealistically large increase in fuel taxes, no single policy appears likely to be capable of achieving the target reductions by 2010, although certain combinations of policies may be able to achieve the targets However, if the time frame is extended out to 2030, certain technology-oriented policies appear quite promising for achieving large GHG reductions

15 citations

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Abstract: If hydrogen (H2) is to significantly reduce greenhouse gas emissions and oil use, it needs to displace conventional transport fuels and be produced in ways that do not generate significant greenhouse gas emissions. This paper analyses alternative ways H2 can be produced, transported and used to achieve these goals. Several H2 scenarios are developed and compared to each other. In addition, other technology options to achieve these goals are analyzed. A full fuel cycle analysis is used to compare the energy use and carbon (C) emissions of different fuel and vehicle strategies. Fuel and vehicle costs are presented as well as cost-effectiveness estimates. Lowest hydrogen fuel costs are achieved using fossil fuels with carbon capture and storage. The fuel supply cost for a H2 fuel cell car would be close to those for an advanced gasoline car, once a large-scale supply system has been established. Biomass, wind, nuclear and solar sources are estimated to be considerably more expensive. However fuel cells cost much more than combustion engines. When vehicle costs are considered, climate policy incentives are probably insufficient to achieve a switch to H2. The carbon dioxide (CO2) mitigation cost would amount to several hundred US$ per ton of CO2. Energy security goals and the eventual need to stabilize greenhouse gas concentrations could be sufficient. Nonetheless, substantial development of related technologies, such as C capture and storage will be needed. Significant H2 use will also require substantial market intervention during a transition period when there are too few vehicles to motivate widely available H2 refueling.

3 citations

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Abstract: It has long been realized that improving energy efficiency releases an economic reaction that partially offsets the original energy saving. As the energy efficiency of some process improves, the process becomes cheaper, thereby providing an incentive to increase its use. Thus total energy consumption changes less than proportionally to changes in physical energy efficiency. For motor vehicles, the process under consideration is use of fuel in producing vehicle-miles traveled (VMT). Our empirical specification is based on a simple aggregate model that simultaneously determines VMT, vehicles, and fuel efficiency. The coefficient on the lagged dependent variable implies considerable inertia in behavior, with people adjusting their travel in a given year by just 21 percent of the ultimate response to a permanent change. The equation exhibits only mild autocorrelation, giving people confidence that their specification accounts for most influences that move sluggishly over time.

798 citations

01 Oct 2012
Abstract: The Global Energy Assessment (GEA) brings together over 300 international researchers to provide an independent, scientifically based, integrated and policy-relevant analysis of current and emerging energy issues and options. It has been peer-reviewed anonymously by an additional 200 international experts. The GEA assesses the major global challenges for sustainable development and their linkages to energy; the technologies and resources available for providing energy services; future energy systems that address the major challenges; and the policies and other measures that are needed to realize transformational change toward sustainable energy futures. The GEA goes beyond existing studies on energy issues by presenting a comprehensive and integrated analysis of energy chalenges, opportunities and strategies, for developing, industrialized and emerging economies. This volume is a invaluable resource for energy specialists and technologists in all sectors (academia, industry and government) as well as policymakers, development economists and practitioners in international organizations and national governments.

795 citations

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Abstract: Beginning with William Stanley Jevons in 1865, a number of authors have claimed that economically justified energy-efficiency improvements will increase rather than reduce energy consumption. 'Jevons Paradox' is extremely difficult to test empirically, but could have profound implications for energy and climate policy. This paper summarises and critiques the arguments and evidence that have been cited in support of Jevons' Paradox, focusing in particular on the work of Len Brookes and Harry Saunders. It identifies some empirical and theoretical weaknesses in these arguments, highlights the questions they raise for economic orthodoxy and points to some interesting parallels between these arguments and those used by the 'biophysical' school of ecological economics. While the evidence in favour of 'Jevons Paradox' is far from conclusive, it does suggest that economy-wide rebound effects are larger than is conventionally assumed and that energy plays a more important role in driving productivity improvements and economic growth than is conventionally assumed. 2008 Elsevier Ltd. All rights reserved.

774 citations

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Abstract: The unprecedented scale of food waste in global food supply chains is attracting increasing attention due to its environmental, social and economic impacts. Drawing on interviews with food waste specialists, this study construes the boundaries between food surplus and food waste, avoidable and unavoidable food waste, and between waste prevention and waste management. This study suggests that the first step towards a more sustainable resolution of the food waste issue is to adopt a sustainable production and consumption approach and tackle food surplus and waste throughout the global food supply chain. The authors examine the factors that give rise to food waste throughout the food supply chain, and propose a framework to identify and prioritize the most appropriate options for prevention and management of food waste. The proposed framework interprets and applies the waste hierarchy in the context of food waste. It considers the three dimensions of sustainability (environmental, economic, and social), offering a more holistic approach in addressing food waste. Additionally, it considers the materiality and temporality of food. The food waste hierarchy posits that prevention, through minimization of food surplus and avoidable food waste, is the most attractive option. The second most attractive option involves the distribution of food surplus to groups affected by food poverty, followed by the option of converting food waste to animal feed. Although the proposed food waste hierarchy requires a fundamental re-think of the current practices and systems in place, it has the potential to deliver substantial environmental, social and economic benefits.

749 citations