Some energy services and industrial processes-such as long-distance freight transport, air travel, highly reliable electricity, and steel and cement manufacturing-are particularly difficult to provide without adding carbon dioxide (CO) to the atmosphere. Rapidly growing demand for these services, combined with long lead times for technology development and long lifetimes of energy infrastructure, make decarbonization of these services both essential and urgent. We examine barriers and opportunities associated with these difficult-to-decarbonize services and processes, including possible technological solutions and research and development priorities. A range of existing technologies could meet future demands for these services and processes without net addition of CO to the atmosphere, but their use may depend on a combination of cost reductions via research and innovation, as well as coordinated deployment and integration of operations across currently discrete energy industries.

Understanding the sensitivity of gasoline demand to changes in prices and income has important implications for policies related to climate change, optimal taxation and national security, to name only a few. While the short-run price and income elasticities of gasoline demand in the United States have been studied extensively, the vast majority of these studies focus on consumer behavior in the 1970s and 1980s. There are a number of reasons to believe that current demand elasticities differ from these previous periods, as transportation analysts have hypothesized that behavioral and structural factors over the past several decades have changed the responsiveness of U.S. consumers to changes in gasoline prices. In this paper, we compare the price and income elasticities of gasoline demand in two periods of similarly high prices from 1975 to 1980 and 2001 to 2006. The short-run price elasticities differ considerably: and range from-0.034 to-0.077 during 2001 to 2006, versus-0.21 to-0.34 for 1975 to 1980. The estimated short-run income elasticities range from 0.21 to 0.75 and when estimated with the same models are not significantly different between the two periods.

Background: Positioned at the frontlines of the battle against COVID-19 disease, nurses are at increased risk of contraction, yet as they feel obligated to provide care, they also experience ethical pressure. Research question and objectives: The study examined how Israeli nurses respond to ethical dilemmas and tension during the COVID-19 outbreak, and to what extent this is associated with their perceived risk and motivation to provide care? Research design: The study implemented a descriptive correlative study using a 53-section online questionnaire, including 4 open-ended questions. Participants and research context: The questionnaire was complete by 231 registered and intern nurses after being posted on nurses’ Facebook and WhatsApp groups, and through snowball sampling. Ethical considerations: The research was pre-approved by the ethics committee of the Faculty of Social Welfare and Health Sciences at the University of Haifa, Israel. Findings: In all, 68.8% of the respondents had received some form of training about COVID-19. Respondents positioned themselves at perceived high risk levels for contracting the virus. About one-third feared going to work because of potential contraction and due to feeling inadequately protected. While 40.9% were scared to care for COVID-19 patients, 74.7% did not believe they have the right to refuse to treat certain patients. When asked about defining an age limit for providing patients with scarce resources (such as ventilation machines) in cases of insufficient supplies, respondents stated that the maximum age in such scenarios should be 84 (standard deviation (SD = 19) – yet most respondents (81.4%) believed that every patient has the right to receive optimal treatment, regardless of their age and medical background. Discussion: Correlating with their strong commitment to care, nurses did not convey intention to leave the profession despite their stress, perceived risk, and feelings of insufficient support and protection at work. The nurses did not hold a utilitarian approach to resource allocation, thereby acknowledging the value of all people and their entitlement to care, regardless of optimal outcomes. Conclusion: While experiencing significant personal risk and emotional burden, nurses conveyed strong dedication to providing care, and did not regret working in the nursing profession, yet they did seek a supportive climate for their needs and ethical concerns.

Many diverse actions can be taken to reduce greenhouse gas (GHG) emissions. Increasingly in the United States, policy-makers at subnational levels are setting emission targets and implementing plans for sector-specific GHG reductions. In this paper, local, state, and regional policy actions in the US are inventoried and analyzed as to their potential effect on national emissions. The realization of all existing subnational initiatives, as of September 2007, could stabilize US emissions at 2010 levels by the year 2020. The scale of these many decentralized mitigation actions, and their tendency to follow consistent steps, provide a counterpoint to oft-cited drawbacks of decentralized environmental policy. It also indicates that the US has been more committed to climate change mitigation than is generally acknowledged. r

Understanding the sensitivity of gasoline demand to changes in prices and income has important implications for policies related to climate change, optimal taxation and national security, to name only a few. While the short-run price and income elasticities of gasoline demand in the United States have been studied extensively, the vast majority of these studies focus on consumer behavior in the 1970s and 1980s. There are a number of reasons to believe that current demand elasticities differ from these previous periods, as transportation analysts have hypothesized that behavioral and structural factors over the past several decades have changed the responsiveness of U.S. consumers to changes in gasoline prices. In this paper, we compare the price and income elasticities of gasoline demand in two periods of similarly high prices from 1975 to 1980 and 2001 to 2006. The short-run price elasticities differ considerably: and range from-0.034 to-0.077 during 2001 to 2006, versus-0.21 to-0.34 for 1975 to 1980. The estimated short-run income elasticities range from 0.21 to 0.75 and when estimated with the same models are not significantly different between the two periods.

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The lack of hydrogen fuel stations is a major barrier to the introduction of hydrogen vehicles. Given the high cost of constructing hydrogen stations, it is desirable to build as few stations as possible while still adequately serving consumers. Although several studies have addressed the general question of how many stations are needed, the literature has been largely silent on how to relate the location of stations to the sufficient number of hydrogen stations. A geographic information system (GIS) provides a tool for evaluating station siting decisions as part of a greater hydrogen network. A GIS model was developed for siting generic hydrogen stations in Sacramento County, California, with the economics of supplying those stations with hydrogen ignored for now. The analysis used average one-way driving time from home or work to a station as a metric to evaluate scenarios. When a network is posited with 30% as many retail fuel stations as now exist, average driving time from home to a station would be 16 s more than it is with the full existing network of stations. With 5% of existing stations supplying hydrogen (or any other alternative fuel), the average driving time to a station could be as little as 4 min in Sacramento County. These estimates assume free-flow traffic; actual times will vary. This modeling approach provides an analytical framework for siting early hydrogen fuel stations. Initial results suggest a few strategically sited stations could be sufficient to satisfy a large number of prospective consumers.

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