ORCID Profile
0000-0002-6505-3459
Current Organisations
Monash University - Caulfield Campus
,
Monash University
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Publisher: MDPI AG
Date: 16-09-2019
DOI: 10.3390/EN12183543
Abstract: Given that global energy use today is still dominated by fossil fuels, there is an urgent need to rapidly reduce its use in order to avert serious climate change. However, the alternatives to fossil fuels—renewable and nuclear energy—are more expensive, and have so far done little to displace fossil fuels. Accordingly, reducing energy use must play an important part in both averting climate change and avoiding the depletion of high energy return easily recoverable fossil fuel reserves. This paper examined both the potential and barriers to the adoption of energy reduction measures, with particular attention to domestic energy and passenger transport. The main finding was that energy efficiency approaches alone are unlikely to deliver anywhere near the energy reductions needed in the limited time available. Instead, most energy reductions will have to come from energy conservation, involving less use of energy-using devices, including private vehicles. Achieving such reductions will require changes in lifestyles, especially for residents of OECD nations.
Publisher: MDPI AG
Date: 22-12-2022
DOI: 10.3390/EN16010122
Abstract: In 2022, the record of extreme weather events already includes deep droughts in Sichuan province, China, and California, US floods inundating a third of Pakistan and serious and repeated flooding in Eastern Australia heat waves and drought in Europe and wildfires in Europe and the western US [...]
Publisher: Inderscience Publishers
Date: 2007
Publisher: Elsevier BV
Date: 1979
Publisher: Elsevier BV
Date: 12-2008
Publisher: Elsevier BV
Date: 12-2012
Publisher: MDPI AG
Date: 20-09-2023
Publisher: Inderscience Publishers
Date: 2007
Publisher: MDPI AG
Date: 05-10-2022
DOI: 10.3390/EN15197315
Abstract: This review explores the question: should the world rely wholly or partially on solar geoengineering (SG) to mitigate climate change (CC), or on renewable energy, together with deep energy reductions? Recent thinking is for SG to only supplement more conventional climate change mitigation methods. However, we first show that conventional mitigation methods are not working., given that global annual CO2 emissions are still rising, so it is far more likely that SG will be called upon to counter most anthropogenic CC, as early research proposed. The paper next examines the various SG proposals that have been considered and their objectives. Future choices could be between an increasingly unpredictable climate, and SG, with its own risks and unknowns, or deep energy reductions and RE. The claim is that SG has far lower costs for a given climate forcing reduction compared with more conventional methods, and equally important, could be quickly implemented, producing temperature reductions in a year or so, compared with decades needed for more conventional mitigation approaches. SG implementation would affect not only the technical potential for key RE sources but also the actual uptake of RE and energy reductions. However, a fair comparison of RE and SG must recognise that the SG option also requires a solution to rising ocean acidification (OA). Because the material quantities needed annually to counter OA are orders of magnitude larger than for SG, its costs and energetic requirements will also be far higher, as will the time for implementation.
Publisher: Informa UK Limited
Date: 2020
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 06-2019
Publisher: Inderscience Publishers
Date: 2003
Publisher: Elsevier BV
Date: 06-2015
Publisher: Informa UK Limited
Date: 09-1991
Publisher: Informa UK Limited
Date: 09-1998
Publisher: MDPI AG
Date: 10-11-2019
DOI: 10.3390/EN12224280
Abstract: For millennia, humans relied almost entirely on renewable energy (RE), largely biomass, for their energy needs. Over the past century, fossil fuels (FFs) have not only largely replaced RE, but have enabled a many-fold rise in total energy use. This FF dominance changed the way we think about and accounted for energy use. If (as at present) the world essentially continues to ignore climate change, eventual resource depletion will force conversion to RE and, perhaps, nuclear energy will once again have to provide most of the world’s energy use. However, the change is more likely to come about because of the urgent need for climate change mitigation. At present, primary RE electricity accounting is done by calculating the FF energy that would be needed to produce it. But as FFs disappear, this approach makes less sense. Instead, a new approach to energy accounting will be needed, one that allows for the intermittent nature of the two most abundant RE sources, wind and solar power. Surplus intermittent RE might be converted to H2, further complicating energy accounting. An additional complication will be the treatment of energy reductions, especially from passive solar energy, likely to be more important in the coming decades. This paper is a review of the evidence to try to determine the best approach to future energy accounting.
Publisher: Inderscience Publishers
Date: 2002
Publisher: MDPI AG
Date: 08-02-2021
DOI: 10.3390/ENCYCLOPEDIA1010018
Abstract: Global passenger transport consists of all passenger travel by private and public road vehicles, rail passenger travel, air travel, and non-motorized travel. The vehicular travel component expanded an estimated 14-fold between 1950 and 2018, so that now it is not only a major energy user and CO2 emitter, but also the cause of a variety of other negative effects, especially in urban areas. Global transport in future will be increasingly subject to two contradictory forces. On the one hand, the vast present inequality in vehicular mobility between nations should produce steady growth as low-mobility countries raise material living standards. On the other hand, any such vast expansion of the already large global transport task will magnify the negative effects of such travel. The result is a highly uncertain global transport future.
Publisher: MDPI AG
Date: 07-08-2019
DOI: 10.3390/SCI1020043
Abstract: Because of the near-term risk of extreme weather events and other adverse consequences from climate change, and, at least in the longer term, global fossil fuel depletion, there is world-wide interest in shifting to noncarbon energy sources, especially renewable energy (RE). Because of possible limitations on conventional renewable energy sources, researchers have looked for ways of overcoming these shortcomings by introducing radically new energy technologies. The largest RE source today is bioenergy, while solar energy and wind energy are regarded as having the largest technical potential. This paper reviews the literature on proposed new technologies for each of these three RE sources: microalgae for bioenergy, photolysis and airborne wind turbines. The main finding is that their proponents have underestimated the difficulties facing their introduction on a very large scale.
Publisher: Inderscience Publishers
Date: 2007
Publisher: Elsevier BV
Date: 07-2009
Publisher: MDPI AG
Date: 25-08-2023
DOI: 10.3390/EN16176178
Abstract: Conventional methods of climate change (CC) mitigation have not ‘bent the curve’ of steadily rising annual anthropic CO2 emissions or atmospheric concentrations of greenhouse gases. This study reviews the present position and likely future of such methods, using the recently published literature with a global context. It particularly looks at how fast they could be implemented, given the limited time available for avoiding catastrophic CC (CCC). This study then critically examines solar geoengineering, an approach often viewed as complementary to conventional mitigation. Next, this review introduces equity considerations and shows how these even further shorten the available time for effective action for CC mitigation. The main findings are as follows. Conventional mitigation approaches would be implemented too slowly to be of much help in avoiding CCC, partly because some suggested technologies are infeasible, while others are either of limited technical potential or, like wind and solar energy, cannot be introduced fast enough. Due to these problems, solar geoengineering is increasingly advocated for as a quick-acting and effective solution. However, it could have serious side effects, and, given that there would be winners and losers at the international level as well as at the more regional level, political opposition may make it very difficult to implement. The conclusion is that global energy consumption itself must be rapidly reduced to avoid catastrophic climate change, which requires strong policy support.
Publisher: American Chemical Society (ACS)
Date: 14-03-2011
DOI: 10.1021/ES200559K
Publisher: Elsevier BV
Date: 2012
Publisher: Elsevier BV
Date: 2014
Publisher: Elsevier BV
Date: 02-2015
Publisher: Informa UK Limited
Date: 10-2004
Publisher: MDPI AG
Date: 19-04-2023
DOI: 10.3390/ENCYCLOPEDIA3020037
Abstract: Humans have always wanted to know what the future holds in store for them. In earlier centuries, people often sought clues to the future from sacred texts. Today, more secular approaches are increasingly used, although the older approaches to the future persist. Modern methods for prediction include trend extrapolation, the Delphi method, mathematical modeling, and scenario analysis, including backcasting. Extrapolation was only possible when reliable past data became available. The Delphi method relies on the judgement of experts in the subject matter. Mathematical modeling has been very successful in the physical sciences, and, in the form of integrated assessment models (IAMs), has been applied to problems such as assessing future energy use. Scenario analysis looks at a number of possible futures and develops internally consistent story lines around each. It is often used in conjunction with IAMs. Each of the four methods, including both their strengths and weaknesses, are discussed in turn. Finally, this entry looks at the future of prediction, and concludes that despite progress in each of the four approaches treated, predicting the future, never easy, is now harder than ever.
Publisher: MDPI AG
Date: 10-07-2023
DOI: 10.20944/PREPRINTS202307.0628.V1
Abstract: Conventional methods of climate change (CC) mitigation have not ‘bent the curve’ of steadily rising annual anthropic CO2 emissions or atmospheric concentrations of greenhouse gases. This study reviews the present position and likely future of such methods, using recently published literature with a global context. It particularly looks at how fast they could be implemented, given that the limited time available for avoiding catastrophic CC (CCC). The study then examines solar geoengineering, an approach often viewed as complementary to conventional mitigation. The review next introduces equity considerations, and shows how this will shorten even further the time available for effective action for CC mitigation. The main findings are as follows. Conventional mitigation approaches will be implemented too slowly to be of much help in avoiding CCC, partly because some suggested technologies are infeasible, while others are either of limited technical potential, or, like wind and solar energy, cannot be introduced fast enough. Because of these problems, solar geoengineering is increasingly advocated as a quick-acting and effective solution. However, it could have serious side effects, and given that there will be winners and losers at the international as well as the more regional level, political opposition may make it difficult to implement. The conclusion is that global energy consumption itself must be rapidly reduced to avoid catastrophic climate change.
Publisher: MDPI AG
Date: 03-04-2023
DOI: 10.20944/PREPRINTS202304.0014.V1
Abstract: Our planet faces several serious and urgent challenges to sustainability, not just climate change. Most researchers argue that technological solutions can solve these problems. This review paper first examines the prospects for decoupling environmental damages in general from economic growth, considered at the global level, then looks at whether the recent advances in Information and Communication Technology (ICT) can help. It is argued that although absolute decoupling might have occurred in some countries, even after accounting for energy-intensive imports, it has not occurred at the global level, which is the relevant level for global sustainability problems. This conclusion is strengthened by the very high correlation over the past three decades found between GDP and several parameters relevant for sustainability, particularly for atmospheric CO2 ppm and ecological footprint as a function of Gross Domestic Product (GDP). ICT innovations relevant to energy use include smart grids and smart cities, especially smart urban transport. A review of recently published papers shows no definite findings of energy or carbon reduction, although some innovations show energy/carbon reduction potential, if given strong policy support. However, the needed policies could well give marked reductions even without ICT approaches. Overall, it is concluded that Earth’s sustainability challenges will necessitate deep energy reductions, which in turn require profound sociopolitical changes.
Publisher: Elsevier BV
Date: 11-2008
Publisher: Elsevier BV
Date: 04-2008
Publisher: Elsevier BV
Date: 02-2010
Publisher: MDPI AG
Date: 28-12-2022
DOI: 10.3390/APP13010388
Abstract: A number of technical solutions have been proposed for tackling global climate change. However, global climate change is not the only serious global environmental challenge we face demanding an urgent response, even though atmospheric CO2 ppm have risen from 354 in 1990 to 416 in 2020. The rise of multiple global environmental challenges makes the search for solutions more difficult, because all technological solutions give rise to some unwanted environmental effects. Further, not only must these various problems be solved in the same short time frame, but they will need to be tackled in a time of rising international tensions, and steady global population increase. This review looks particularly at how all these environmental problems impact the future prospects for renewable energy (RE), given that RE growth must not exacerbate the other equally urgent problems, and must make a major difference in a decade or so. The key finding is that, while the world must shift to RE in the longer run, in the short term what is more important is to improve Earth’s ecological sustainability by the most effective means possible. It is shown that reducing both the global transport task and agricultural production (while still providing an adequate diet for all) can be far more effective than converting the energy used in these sectors to RE.
Publisher: MDPI AG
Date: 14-06-2023
DOI: 10.3390/EN16124706
Abstract: Energy efficiency is, in principle, a simple idea: an output of human value, for ex le, vehicle-km traveled, ided by the needed input energy. Efficiency improvements are regarded as an important means of mitigating not only climate change, but also other environmental problems. Despite the vast number of articles published on energy efficiency, a few people question whether it is a useful or accurate measure in its present form nearly all papers are either engineering studies, or address barriers to efficiency improvements. This review addresses this issue via a critical review of the literature, including not only papers on energy efficiency, but those on adjacent areas of research that can help broaden the scope, both geographically and conceptually. These shortcomings are illustrated in case studies of buildings/cities and road passenger transport. The main findings of this review are that (1) energy efficiency inevitably has an ethical dimension, as well as a technical one, in that feedbacks are more widespread than they have generally considered to be, and (2) that conventional efficiency measures omit important energy input items, particularly those concerned with the mining the materials needed for renewable energy plants. The key conclusions are that present efficiency measures are not adequate, and future research is needed to overcome these shortcomings.
Publisher: MDPI AG
Date: 22-10-2020
DOI: 10.3390/EN13215543
Abstract: Controversy exists as to whether renewable energy (RE) can provide for all the world’s energy needs. The purpose of this paper is to help resolve this vital question. Official forecasts see a resumption of a business-as-usual world after the pandemic-induced recession, with further economic growth out to at least 2050. The novel approach taken in this paper is to assume that such a world is fueled entirely with RE at global energy levels at or above those of today, and then to examine whether this scenario is feasible. Because the intermittent primary electricity sources, wind, and solar power, would have to supply nearly all this energy, a simplification made for this analysis is that they do supply 100% of all energy, including non-electrical energy needs. It is found that the energy that could be delivered by these two sources is much less than often assumed, for several reasons: The declining quality of inputs the need for inclusion of uncounted environmental costs the need for energy conversion and storage and the removal of existing fossil fuel energy subsidies. It is concluded that a future world entirely fuelled by RE would necessarily be a lower-energy one.
Publisher: Elsevier BV
Date: 2009
Publisher: Elsevier BV
Date: 08-2007
Publisher: Elsevier BV
Date: 09-2020
Publisher: MDPI AG
Date: 15-05-2023
DOI: 10.3390/SU15108043
Abstract: Our planet faces several serious and urgent challenges to sustainability including, but not limited to, climate change however, most researchers argue that technological solutions can solve these problems. This review first examines the prospects for decoupling environmental damages in general from economic growth, considered at the global level then, it looks at whether the recent advances in information and communication technology (ICT) can help. It is argued that although absolute decoupling may have occurred in some countries—even after accounting for energy-intensive imports—it has not occurred at the global level, which is the relevant level for global sustainability problems. This conclusion is strengthened by the very high correlation over the past three decades found between global gross domestic product (GDP) and several parameters relevant for sustainability, particularly for atmospheric CO2 concentrations and ecological footprint as a function of GDP. ICT innovations relevant to energy use include smart grids and smart cities, especially smart urban transport. A review of recently published papers shows no definite findings of energy or carbon reduction, although some innovations show energy/carbon reduction potential if given strong policy support. Overall, it was concluded that the Earth’s sustainability challenges will probably need deep energy reductions, which in turn require profound sociopolitical changes.
Publisher: JSTOR
Date: 1990
DOI: 10.2307/20635589
Publisher: Elsevier BV
Date: 2009
Publisher: Elsevier BV
Date: 05-2011
Publisher: Elsevier BV
Date: 07-2012
Publisher: MDPI AG
Date: 23-05-2023
DOI: 10.20944/PREPRINTS202305.1564.V1
Abstract: Energy efficiency is, in principle, a simple idea: an output of human value, for ex le, vehicle-km traveled, ided by the needed input energy. Efficiency improvements are regarded by many as an important means of mitigating not only climate change, but also other environmental problems. Accordingly, many countries have efficiency ratings for appliances and efficiency standards for road vehicles. Despite the vast number of articles published on energy efficiency, few question whether it is a useful or accurate measure in its present form. This review addresses this lack, by a critical review of the literature, not only in energy efficiency, but in other areas of research, such as ‘energy services’, that can help broaden the scope of this idea, both geographically and conceptually. These shortcomings are illustrated in case studies of road passenger transport and buildings. The main findings are that energy efficiency inevitably has an ethical dimension, that feedbacks are more widespread than generally considered, and that conventional efficiency measures omit important energy input items, particularly those concerned with mining of the materials needed for renewable energy plants. Finally, the key results of this review are summarized, and its limitations are discussed, as is the future research needed to overcome these shortcomings.
Publisher: MDPI AG
Date: 10-2020
DOI: 10.3390/WORLD1030014
Abstract: Two vital challenges facing the world are global inequality and global climate change. Solutions to both these problems are urgently needed, but, given current policies, they can potentially conflict with each other. The United Nations has set 17 Sustainable Development Goals (SDGs) to be met by 2030. Even in 2019, the world was not on track for many SDGs, but the 2020 coronavirus pandemic has made their timely attainment even less likely. Similarly, atmospheric carbon dioxide concentrations have continued to rise, even in the first half of 2020. Clearly, present approaches to solving both problems are not working. This paper suggests several non-mainstream approaches that have the potential to address both challenges. A prerequisite is deep reductions in fossil fuel energy. Possible policies to achieve this include major cuts in air and car travel, shifts to a vegetarian diet, a global carbon tax and transitioning to some form of universal basic income.
Publisher: MDPI AG
Date: 15-07-2022
DOI: 10.3390/ENCYCLOPEDIA2030091
Abstract: For all of human history except the past two centuries or so, bioenergy provided nearly all the world’s primary energy. Then, fossil fuels largely replaced bioenergy, but concern about climate change and fossil fuel depletion will force a move back to renewable energy, including bioenergy. The main method used here to study the future of global bioenergy was a literature surview of relevant published papers, with emphasis both on those published after 2020, and those having a global focus. The key finding is that bioenergy is unlikely to greatly increase its share of global energy consumption, for several reasons. Liquid biofuel production for transport is likely to almost disappear as countries progressively phase out internal combustion engine vehicles. Traditional firewood use is also projected to fall. There are also doubts about the technical potential of bioenergy, not only because it must compete with the other uses for biomass—food, fodder, fibre and timber—but also because in many cases its climate change mitigation impact is less than for other approaches, including alternative renewable energy sources. The overall conclusion is that bioenergy will have a minor but still useful role in the future global energy system, but global energy reductions are likely to be more important for climate stability than bioenergy.
Publisher: Elsevier BV
Date: 12-2022
Publisher: Oxford University Press (OUP)
Date: 06-2022
Abstract: Transformative governance is key to addressing the global environmental crisis. We explore how transformative governance of complex bio ersity–climate–society interactions can be achieved, drawing on the first joint report between the Intergovernmental Panel on Climate Change and the Intergovernmental Science-Policy Platform on Bio ersity and Ecosystem Services to reflect on the current opportunities, barriers, and challenges for transformative governance. We identify principles for transformative governance under a bio ersity–climate–society nexus frame using four case studies: forest ecosystems, marine ecosystems, urban environments, and the Arctic. The principles are focused on creating conditions to build multifunctional interventions, integration, and innovation across scales coalitions of support equitable approaches and positive social tipping dynamics. We posit that building on such transformative governance principles is not only possible but essential to effectively keep climate change within the desired 1.5 degrees Celsius global mean temperature increase, halt the ongoing accelerated decline of global bio ersity, and promote human well-being.
Publisher: MDPI AG
Date: 06-01-2021
DOI: 10.3390/SCI3010005
Abstract: Because of the near-term risk of extreme weather events and other adverse consequences from climate change and, at least in the longer term, global fossil fuel depletion, there is worldwide interest in shifting to noncarbon energy sources, especially renewable energy (RE). Because of possible limitations on conventional renewable energy sources, researchers have looked for ways of overcoming these shortcomings by introducing radically new energy technologies. The largest RE source today is bioenergy, while solar energy and wind energy are regarded as having by far the largest technical potential. This paper reviews the literature on proposed new technologies for each of these three RE sources: microalgae for bioenergy, photolysis and airborne wind turbines. The main finding is that their proponents have often underestimated the difficulties they face and the time taken for their introduction on a very large scale.
Publisher: Elsevier BV
Date: 03-2011
Publisher: Elsevier BV
Date: 11-2010
No related grants have been discovered for Patrick Moriarty.