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2009, Renewable and Sustainable Energy Reviews
AI
The paper examines the recent surge in biofuel production driven by skyrocketing oil prices and environmental concerns. It highlights the significance of biofuels in addressing energy security while analyzing various raw materials and production methods. Furthermore, it addresses the environmental impacts of biofuel production, including land use and food security issues, concluding that responsible policies and international cooperation are essential for sustainable development in this sector.
Environmental Quality Management, 2011
We begin with a discussion of energy issues, noting some basic problems with dependency on fossil fuels. We also survey the energy situation as it exists today, including efforts to find alter--native and renewable energy sources, especially related to food production.As the discussion makes clear, today's econ--omy is based on a linear approach that wastes energy and material resources at many stages of the production process. We highlight the need for a new strategy that abandons this approach in favor of an interrelated and holistic methodol-ogy: Systemic Design. Systemic thinking sees production as a com--prehensive system, not a series of disconnected stages. From this viewpoint, by--products and waste are not simply discards. Instead, they are "outputs" that can be used productively in other processes. Systemic thinking in design aims to unite economic, social, cultural, and environmen--tal demands. This approach can em--power human be--ings in their re--lationship with nature, production, and the environment . In the final sections of this article, we offer some guidelines and practical policies that can be used to promote holistic development that is genuinely sustainable. On the planet we inhabit, energy flows from the sun, abundantly and consistently. Over the last 200 years, however, we seem to have forgot--ten that this energy flow follows precise rules that are unchangeable and need to be respected if we want to preserve the biochemical conditions necessary for the survival of the human species. These crucial rules involve entropy and the second law of thermodynamics. According to these laws, when energy is used to transform mat--ter, it becomes progressively more disordered and diminished in qualityproducing pollution and, in Earth's biosphere, climate change. How does nature transform matter through the energy flowing from the sun? Nature does not burn anything, but instead produces energy and life through thermochemical processes such as photosynthesis. Burning fossil fuels has introduced an en--ergy production system based on combustion rather than thermochemistry. Consuming these fuels, which were cre--ated as deposits of carbon hundreds of millions of years ago, has accelerated the entropic processes on the planet. Climate change, pollution, and health hazards are only the consequences of an energy model based on combustion rather than thermochemical processes. Oil is a valuable substance that should be used as a raw material for chemicals and pharmaceuti--cals, not burned as a source of energy. As Angelo Consoli recently noted, "it is incredible that in the year 2010 we are continuing to produce en--ergy by combustion processes when human intel--lect and technology have developed more natural and less destructive models" (Consoli, 2010a). The continuing reliance on fossil fuels is the result of bad economic choices and poor research strategies. We have invested enormous sums pursuing oil and nuclear energy instead of devel--oping solar and hydrogen technologies, which could lead the world in another direction. If we had respected the law of entropy, by now we could have small and efficient solar panels that would be affordable to all people living in the southern regions of the world, where solar radia--tion is strongest. It is time for energy choices that empower human beings, with appropriate technologies and reasonable technology--transfer policies. We must produce energy in a way that is compat--ible with Earth's ecosystems and that preserves the planet's chemical and climate conditions for generations to come. Understanding Our Current Energy Situation "The time has come for societies to move from the romance with nature to a pragmatic redesign of our economic system inspired by eco--systems" .When seeking to define a better energy pol--icy, it is difficult to manage (and find the right balance among) the huge number of variables involved. Policy decisions must encompass all sectors, taking into consideration their energy impacts and the new models of production that may be needed. This challenge is particularly rel--evant for the food sector, where it is often easy to fall into the trap of considering food and energy as trade--offs, rather than considering energy as one of the main inputs and outputs of the whole food chain. As a source of energy, oil is transportable and easy to use. It also forms the basis for many industrial chemicals. Since the beginning of the twentieth century, these characteristics have made oil one of the most important commodi--ties in the world. Despite the centrality of oil to current industrial development, however, data provided by the International Energy Agency re--veal the unsustainability of the petroleum--based model: • From 1999 to 2011, the price of crude oil rose by over 400 percent, from $17 to over $80 a barrel. • Many experts forecast that world oil produc--tion will reach its maximum no later than 2030 and then begin declining rapidly, in accordance with the "peak oil" predictions of geoscientist M. King Hubbert. • The current level of oil consumption is over 30 billion barrels annually, with projected yearly increases of as much as 2.5 percent.• The new oil reserves being discovered in any given year often amount to only about one--quarter to one--half of the oil consumed, meaning that oil reserves are being depleted rapidly; even with improvements in extrac--tion methods, the world's demand for oil is outpacing the supply. Much of the oil being produced today comes from areas of geopolitical conflict and instability. In addition, the scarcity of oil has forced petro--leum companies to explore areas that are increas--ingly less accessible. Clearly, there is a pressing need to restruc--ture our economy so that it can become less dependent on oil, especially in strategic sectors. In pursuing energy alternatives, however, it is important to follow a systemic approach. Oth--erwise, in solving old problems, we will simply create new ones. To be genuinely sustainable, renewable technologies and strategies must be introduced within a context of systemic planning that integrates them into natural and agricultural processes, with efforts at the local, regional, and global levels. The complexity and magnitude of the chal--lenges facing sustainable development are im--mense. Although achieving sustainability has been on the international agenda for decades, much work remains to be done. At the 15th Conference of the Parties to the United Nations Framework Convention on Climate Change (COP 15), held in Copenhagen in December 2009, all participant states agreed on the importance of poverty allevia--tion and working toward sustainable production and consumption, including product and energy policies. In order to achieve these goals, states must integrate their efforts at the local, regional, and global levels with frameworks that fulfill sus--tainable development criteria. Many technology and strategy options exist for the design and implementation of sustain-ability initiatives. However, a more integrated and well--coordinated approach is required if
The Kyoto Protocol encourages the reduction of carbon dioxide and other greenhouse gases, as well as the use of technologies that are renewable and sustainable3. Both bioethanol and biodiesel have less sulphur emissions than diesel. Increased use of Bioenergy is a viable means to reduce greenhouse gas emissions. Factors such as land use change, end use, conversion techniques, agricultural methods and feedstock type will affect the overall impact on reduction of emissions and are examined through Life Cycle Analysis.Land is of value to the rural poor in developing nations because it is a means to gain income through farming. However, the acquisition of land by foreign investors can impinge on access to land for the poor. Land use conflicts are not new in Africa. For example, there have always been conflicts between farming communities and pastoralists, between villagers on village borders, and between communities and the state in national parks and reserved areas. Even within the pastoralist communities there are conflicts over community grazing areas. However, the age old conflicts have been aggravated by the current economic development, of which biofuels is just part of the bigger picture.
Energy Policy, 2013
Energy systems and life cycle impacts are compared under equal conditions. The comparison is done between biofuels and photovoltaic/battery in mobility uses. Biofuels are a valuable option when produced sustainably by efficient routes.
Biofuels are promoted worldwide as an alternative to partially replace fossil fuels. After more than a decade of implementation, important questions have been raised concerning: i) the impacts generated by the change of use and land coverage; ii) the impacts on prices and food production, iii) the impacts on water and the related ecosystem services, and iv) greenhouse gas (GHG) emissions generated by the changes of land use. This article discusses these issues in the current situation of biofuels with emphasis in the tropical countries. Available studies show that despite their small contribution to the world energy matrix, the large-scale expansion of biofuels can generate negative impacts such as increase in the competition for water and land, especially in the vulnerable ecosystem and social structures in tropical countries.
There have being increasing debate on the prospects of biofuel becoming the next best alternative to solving the problem of CO2 emission and the escalating fuel prices, but the question is whether this assertion is true and also if it comes without any cost to pay. This paper seeks to find out whether this much praised alternative to solving these problems is a better option or another way for the developed countries to find more areas where they could get cheap land, labour and raw materials for the production of biofuel. This will focus mainly on some effects the growing biofuel production has on food security, livelihood of people, the environment and some land conflicts developing as a result of land grabbing for biofuel production in the developing countries.
Choice Reviews Online, 2002
2010
The paper presents an overview of the sustainability principles applied to biofuels analysis. Sustainable biofuel production is economically competitive, conserves the natural resource base, and ensures social well-being. There is a strong trend to look for fossil fuel substitutes; nowadays the leading option seems to be the biofuels. In terms of environmental sustainability, the most promising effects are related with emissions of particulate matter and GHG. The economic dimension of sustainability is positive to the agriculture sector, but at the same time biofuel production will mean raising prices of the food market. Moreover, biofuels do not constitute a path to avoid increasing in local fuel prices by international fluctuation of fossil fuel prices. Social sustainability is not clearly positive or negative as well. Depending on operational conditions such, agrochemical use, land rotation, source of energy to feed the process, and security measures for leakages, the sustainabil...
Daedalus, 2013
Today and in the coming decades, the world faces the challenge of meeting the needs of a still-growing human population, and of doing it sustainably – that is, without affecting the ability of future generations to meet their needs. Energy plays a pivotal role in this challenge, both because of its importance to economic development and because of the myriad interactions and influences it has on other critical sustainability issues. In this essay, we explore some of the direct interactions between energy and other things people need, such as food, water, fuel, and clean air, and also some of its indirect interactions with climate, ecosystems, and the habitability of the planet. We discuss some of the challenges and potential unintended consequences that are associated with a transition to clean, affordable energy as well as opportunities that make sense for energy and other sustainability goals. Pursuing such opportunities is critical not just to meeting the energy needs of nine bil...
2009
The increasing prices and environmental impacts of fossil fuels have made the production of biofuels to reach unprecedented volumes over the last 15 years. Given the increasing land requirement for biofuel production, the assessment of the impacts that extensive biofuel production may cause to food supply and to the environment has considerable importance. Agriculture faces some major inter-connected challenges in delivering food security at a time of increasing pressures from population growth, changing consumption patterns and dietary preferences, and post-harvest losses. At the same time, there are growing opportunities and demands for the use of biomass to provide additional renewables, energy for heat, power and fuel, pharmaceuticals and green chemical feedstocks. Biomass from cellulosic bioenergy crops is expected to play a substantial role in future energy systems. However, the worldwide potential of bioenergy is limited, because all land is multi-functional and land is also needed for food, feed, timber, and fiber production, and for nature conservation and climate protection. Furthermore, the potential of bioenergy for climate change mitigation remains unclear due to large uncertainties about future agricultural yield improvements and land availability for biomass plantations. Large-scale cultivation of dedicated biomass is likely to affect bioenergy potentials, global food prices and water scarcity. Therefore, integrated policies for energy, land use and water management are needed. As biomass contains all the elements found in fossil resources, albeit in different combinations, therefore present and developing technologies can lead to a future based on renewable, sustainable and low carbon economies. This article presents [1] risks to food and energy security [2] estimates of bioenergy potential with regard to biofuel production, and [3] the challenges of the environmental impact.
Toxicological & Environmental Chemistry, 2009
Energy is the basis of industrial civilization; without energy, modern life would cease to exist. However, the exploitation, exploration, conversion, and use of energy comes with effects that impact on the environment in one way or another. The different types and sources of energy also have different impacts on the environment and, to varying degrees, depending on whether it is renewable or non-renewable energy type. In this article, the main focus is on the implications and responsibility of the choices we make and the decisions we take in relation to energy conversion and utilization. And judging by the threat the non-renewable energy poses to humans and the environment, it was recommended that the use of renewable energy should be increased and that alternative and sustainable ways to meet our demands should be sought.
A. Agustoni - M. Maretti (eds.), Energy and Social Issues. Theories and Applications, 2012
As Vaclav Smil (2010: 79) has observed, all types of system, from a wood to a lake ecosystem to a megalopolis, are converters of energy, and the availability of energy resources and efficiency in their use determine the potential of every kind human society. In framing a discourse on energy, we may refer to the scheme suggested by British sociologist Ted , who identified three underlying forms of human economic activity: (i) primary appropriation activities, such as hunting, timbering or mining, where the labour is directly aimed at producing use value, and the purposes is the appropriation, selection, extraction, and allocation of materials; (ii) ecoregulatory work processes -essentially agriculture and cattle-raising -where the human economic activity is primarily expressed in actions that regulate natural processes: that is, regulate environmental conditions according to natural organic mechanisms, such as good harvests, in order to allow cattle to live and reproduce. Human labour does not bring about transformative conditions, but optimizes them, since organic processes are fairly resistant to intentional interventions. As with primary appropriation activities, ecoregulatory processes depend closely on the conditions of the natural context; iii. transformative activities: that is, craftsmanship and industrial activities that transform materials 1 for use by humans.
This article aims to present what the future would require for the production and consumption of energy in the world based on the use of clean and renewable energy. To avoid the catastrophic future that is predicted for humanity resulting from global warming, it is imperative, among other measures, to reduce global greenhouse gas emissions by replacing the current global energy matrix based fundamentally on fossil fuels (coal , oil and natural gas) and in nuclear energy, by another global energy matrix structured based on renewable energy resources (hydroelectricity, biomass, solar energy, wind energy and hydrogen) to avoid or minimize global warming and, consequently, the occurrence of catastrophic changes in the Earth's climate. Regardless of the various solutions that may be adopted to eliminate or mitigate the causes of the greenhouse effect, the most important action is, without a doubt, the adoption of measures that contribute to the elimination or reduction of the consumption of fossil fuels in energy production, as well as such as the more efficient use of energy in transport, industry, agriculture and cities (residences and commerce), given that the use and production of energy are responsible for 57% of greenhouse gases emitted by human activity. In this sense, the implementation of a sustainable energy system is essential. A sustainable energy system will only be possible if, in addition to abandoning fossil fuels, energy efficiency is also greatly improved.
The Quarterly Journal of Austrian Economics, 2005
2010
List of figures, tables and boxes xi Preface xxxi Online supplemental material xxxiii Acknowledgements xxxv Chapter highlights xxxvii List of abbreviations xlv Chapter 1 Introduction and Key Points from Volume 1 1.1 The scientific basis for concern about global warming 1.2 Kaya identity and efficiency versus C-free energy tradeoffs 1.3 Potential reductions inend-use energy demand Chapter 2 Solar Energy 2.1 Seasonal, latitudinal and diurnal distribution of solar energy 2.2 Photovoltaic electricity 2.3 Solar thermal generation of electricity 2.4 Solar thermal energy for heating and hot water 2.5 Solar thermal energy for air conditioning 2.6 Solar cogeneration: Integrated PV modules and thermal collectors 2.7 Industrial uses of solar thermal energy 2.8 Direct use of solar energy for desalination, in agriculture and for cooking 2.9 Dealing with the intermittent nature of solar energy 2.10 Synthesis and global potential Chapter 3 Wind Energy CFES_Prelims.qxd 4/9/2010 4:45 PM Page vii 3.17 Benefits to farmers 3.18 Overcoming local opposition 3.19 Global and regional wind energy potential and cost 3.20 Scenario of future wind energy use 3.21 Summary Chapter 4 Biomass Energy 4.1 Introduction 4.2 Sources of biomass for energy 4.3 Processes for extracting energy from biomass 4.4 Electricity from biomass 4.5 Environmental and social considerations in the use of biomass for energy 4.6 Net energy yield and GHG balance of biomass energy 4.7 Biomass as a chemical feedstock 4.8 Comparison of CO 2 emission savings for alternative uses of land 4.9 Global biomass energy potential 4.10 Cost of biomass and biomass products 4.11 Vulnerability of biomass energy production to climatic change 4.
2011
The recent discovery of the genome and DNA, combined with con cerns about reliance on nonre newable energy sources and climate change, have led to efforts to intro duce alternative industrial processes that rely on biological processes and renewable resources. These emerg ing industries are sometimes referred to as the “bioeconomy” and include biofuels, biotechnology, and greenchemistry industries. The bioeconomy is expanding the range of activities that are pursued by agriculture to include the production of feedstock for energy and chemical production, in addition to the production of foods, feeds, and fiber. This paper provides an overview of recent research findings on the eco nomics of biofuel and its relationship to the food sector and the environment. The biofuel industry is probably the most obvious sector of the bio economy. It is producing ethanol from sugarcane in Brazil, from corn in the United States, and from cassava and sugar beets in Thailand and Europe. It is ...
2009
Biofuel production has soared in this decade with backing from government mandates. Seeking to address global warming, promote alternatives to fossil fuels, and increase independence in energy production, many countries have been striving to become key players in the global trade for biofuels as well as increase domestic energy production. Food security and sustainability issues, however, have clouded the future for first-generation biofuels. Second-generation production processes, based on cellulosic material and algae, are emerging, but they are not yet commercially viable on a large scale. The papers in this collection address the social and sustainability dimensions of the biofuel debates, including links between biofuels and food price volatility, poverty, and direct and indirect changes in land use. In the first paper, Jürgen Scheffran provides an overview of key issues in the bioenergy debate, including the demand for biofuels and their impact on different dimensions of security-specifically, energy security and climate change, land use, food and water security, human security, and social
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