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Testimony: 

Before the Subcommittee on Energy and Environment, Committee on Science 
and Technology, House of Representatives: 

United States Government Accountability Office: 
GAO: 

For Release on Delivery: 
Expected at 10:00 a.m. EDT:
Thursday, July 9, 2009: 

Energy And Water: 

Preliminary Observations on the Links between Water and Biofuels and 
Electricity Production: 

Statement of Anu Mittal, Director:
Natural Resources and Environment: 

GAO-09-862T: 

GAO Highlights: 

Highlights of GAO-09-862T, a testimony before the Subcommittee on 
Energy and Environment, Committee on Science and Technology, House of 
Representatives. 

Why GAO Did This Study: 

Water and energy are inexorably linked—energy is needed to pump, treat, 
and transport water and large quantities of water are needed to support 
the development of energy. However, both water and energy may face 
serious constraints as demand for these vital resources continues to 
rise. Two examples that demonstrate the link between water and energy 
are the cultivation and conversion of feedstocks, such as corn, 
switchgrass, and algae, into biofuels; and the production of 
electricity by thermoelectric power plants, which rely on large 
quantities of water for cooling during electricity generation. 

At the request of this committee, GAO has undertaken three ongoing 
studies focusing on the water-energy nexus related to (1) biofuels and 
water, (2) thermoelectric power plants and water, and (3) oil shale and 
water. For this testimony, GAO is providing key themes that have 
emerged from its work to date on the research and development and data 
needs with regard to the production of biofuels and electricity and 
their linkage with water. GAO’s work on oil shale is in its preliminary 
stages and further information will be available on this aspect of the 
energy-water nexus later this year. 

To conduct this work, GAO is reviewing laws, agency documents, and data 
and is interviewing federal, state, and industry experts. GAO is not 
making any recommendations at this time. 

What GAO Found: 

While the effects of producing corn-based ethanol on water supply and 
water quality are fairly well understood, less is known about the 
effects of the next generation of biofuel feedstocks. Corn cultivation 
for ethanol production can require from 7 to 321 gallons of water per 
gallon of ethanol produced, depending on where it is grown and how much 
irrigation is needed. Corn is also a relatively resource-intensive 
crop, requiring higher rates of fertilizer and pesticides than many 
other crops. In contrast, little is known about the effects of large-
scale cultivation of next generation feedstocks, such as cellulosic 
crops. Since these feedstocks have not been grown commercially to date, 
there are little data on the cumulative water, nutrient, and pesticide 
needs of these crops and on the amount of these crops that could be 
harvested as a biofuel feedstock without compromising soil and water 
quality. Uncertainty also exists regarding the water supply impacts of 
converting cellulosic feedstocks into biofuels. While water usage in 
the corn-based ethanol conversion process has been declining and is 
currently estimated at 3 gallons of water per gallon of ethanol, the 
amount of water consumed in the conversion of cellulosic feedstocks is 
less defined and will depend on the process and on technological 
advancements that improve the efficiency with which water is used. 
Finally, additional research is needed on the storage and distribution 
of biofuels. For example, to overcome incompatibility issues between 
the ethanol and the current fueling and distribution infrastructure, 
research is needed on conversion technologies that can be used to 
produce renewable fuels capable of being used in the existing 
infrastructure. 

With regard to power plants, GAO has found that key efforts to reduce 
use of freshwater at power plants are under way but may not be fully 
captured in existing federal data. In particular, advanced cooling 
technologies that use air, not water, for cooling the plant, can 
sharply reduce or even eliminate the use of freshwater, thereby 
reducing the costs associated with procuring water. However, plants 
using these technologies may cost more to build and witness lower net 
electricity output—especially in hot, dry conditions. Nevertheless, a 
number of power plant developers in the United States have adopted 
advanced cooling technologies, but current federal data collection 
efforts may not fully document this emerging trend. Similarly, plants 
can use alternative water supplies such as treated waste water from 
municipal sewage plants to sharply reduce their use of freshwater. Use 
of these alternative water sources can also lower the costs associated 
with obtaining and using freshwater when freshwater is expensive, but 
pose other challenges, including requiring special treatment to avoid 
adverse effects on cooling equipment. Alternative water sources play an 
increasingly important role in reducing power plant reliance on 
freshwater, but federal data collection efforts do not systematically 
collect data on the use of these water sources by power plants. To help 
improve the use of alternatives to freshwater, in 2008, the Department 
of Energy awarded about $9 million to examine among other things, 
improving the performance of advanced cooling technologies. Such 
research is needed to help identify cost effective alternatives to 
traditional cooling technologies. 

View [hyperlink, http://www.gao.gov/products/GAO-09-862T] or key 
components. For more information, contact Anu Mittal at (202) 512-3841 
or mittala@gao.gov. 

[End of section] 

Mr. Chairman and Members of the Subcommittee: 

I am pleased to be here today to participate in your hearing on 
technology research and development for the energy-water linkage often 
referred to as the energy-water nexus. As you know, water and energy 
are inexorably linked, mutually dependent, and each affects the other's 
availability. Energy is needed to pump, treat, and transport water, and 
large quantities of water are needed to support the development of 
energy. Production of biofuels that may help reduce our dependency on 
oil, and the cooling of power plants that today provide the electricity 
we use, represent two examples where water supply is tied directly to 
our ability to provide energy. 

However, both water and energy are facing serious supply constraints. 
Freshwater is increasingly in demand to meet the needs of 
municipalities, farmers, industries, and the environment. Likewise, 
rising demand for energy--fueled by both population growth and 
expanding uses of energy--may soon outstrip our ability to supply it 
with existing resources. Looking just at electricity, according to the 
Energy Information Administration's (EIA) most recent Annual Energy 
Outlook, 259 gigawatts of new generating capacity--the equivalent of 
259 large coal-fired power plants--will be needed between 2007 and 
2030. As the country's energy needs grow along with its population, 
additional pressure will likely be put on our water resources. 

Given the importance of water and energy, both the federal government 
and state governments play key roles in monitoring, regulating, 
collecting information, and supporting research on energy and water 
issues. In general, state governments play a central role in overseeing 
water availability and use by evaluating water supplies and permitting 
water uses. However, while much of the authority governing water supply 
and distribution lies with state and local governments, the federal 
government also has a role in helping the country meet its energy needs 
without damaging or depleting our supplies of freshwater. For example, 
federal agencies, including the Department of Energy (DOE), have 
provided data and analysis about water use for energy production, as 
well as funded related research and development. These activities are 
important to further our understanding of how to more efficiently use 
such critical resources. 

At the request of this committee, GAO currently has work under way 
related to three aspects of the energy-water nexus--water use in the 
production of biofuels, water use at thermoelectric power plants, and 
water use in the extraction of oil from shale. We expect to release 
reports on biofuels and thermoelectric power plants later this year. 
For each study, the committee asked us to identify technologies that 
could help reduce the amount of water needed to produce energy from 
these sources. My testimony today discusses key themes we have 
identified during our work to date on the two ongoing energy-water 
nexus jobs that are furthest along, specifically (1) biofuels and water 
use and (2) thermoelectric power plants and water use. Our work on oil 
shale is in its very preliminary stages and we will have further 
information to share with the committee on this aspect of the energy- 
water nexus later this year. 

To identify the effects of biofuel cultivation, conversion, and storage 
on water supply and water quality, we are conducting a review of 
relevant scientific articles and key federal and state government 
reports. In addition, in consultation with the National Academy of 
Sciences, we identified and spoke with a number of experts who have 
published research analyzing the water supply requirements of one or 
more biofuel feedstocks and the implications of increased biofuel 
cultivation and conversion on water quality. Furthermore, we are 
interviewing officials from DOE, the Environmental Protection Agency 
(EPA), and the Department of Agriculture (USDA) about impacts on water 
supply and water quality during the cultivation of biofuel feedstocks 
and the conversion and storage of the finished biofuels. To identify 
the relationship of thermoelectric plants and water, we are reviewing 
selected reports, interviewing federal officials and experts, and 
examining relevant energy and water data. In particular, we are 
examining reports on alternative cooling technologies and water 
supplies and the impact they can have on water use at power plants. We 
are also interviewing officials from DOE, EPA, and the Department of 
Interior's U.S. Geological Survey, as well as state water regulators 
and water and energy experts at national energy laboratories and 
universities. In addition, we are interviewing representatives from 
electric power producers, sellers of electric power plant equipment, 
cooling technology companies, and engineering firms that design new 
power plants. Finally, we are examining power plant data on water 
source, use, consumption, and cooling technology types collected by EIA 
and data collected and reported by the U.S. Geological Survey. Our work 
is being conducted in accordance with generally accepted government 
accounting standards. Those standards require that we plan and perform 
the audit to obtain sufficient, appropriate evidence to provide a 
reasonable basis for our findings and conclusions based on our audit 
objectives. We believe that the evidence obtained provides a reasonable 
basis for our findings and conclusions based on our audit objectives. 

Background: 

Biofuels are an alternative to petroleum-based transportation fuels and 
derived from renewable resources. Currently, most biofuels are derived 
from corn and soybeans. Ethanol is the most commonly produced biofuel 
in the United States, and about 98 percent of it is made from corn that 
is grown primarily in the Midwest. Corn is converted to ethanol at 
biorefineries through a fermentation process and requires water inputs 
and outputs at various stages of the production process--from growth of 
the feedstock to conversion into ethanol. While ethanol is primarily 
produced from corn grains, next generation biofuels, such as cellulosic 
ethanol and algae-based fuels, are being promoted for various reasons 
including their potential to boost the nation's energy independence and 
lessen environmental impacts, including on water. Cellulosic feedstocks 
include annual or perennial energy crops such as switchgrass, forage 
sorghum, and miscanthus; agricultural residues such as corn stover (the 
cobs, stalks, leaves, and husks of corn plants); and forest residues 
such as forest thinnings or chips from lumber mills. Some small 
biorefineries have begun to process cellulosic feedstocks on a pilot- 
scale basis; however, no commercial-scale facilities are currently 
operating in the United States.[Footnote 1] In light of the federal 
renewable fuel standard's requirements for cellulosic ethanol starting 
in 2010,[Footnote 2] DOE is providing $272 million to support the cost 
of constructing four small biorefineries that will process cellulosic 
feedstocks. In addition, in recent years, researchers have begun to 
explore the use of algae as a biofuel feedstock. Algae produce oil that 
can be extracted and refined into biodiesel and has a potential yield 
per acre that is estimated to be 10 to 20 times higher than the next 
closest quality feedstock. Algae can be cultivated in open ponds or in 
closed systems using large raceways of plastic bags containing water 
and algae. 

Thermoelectric power plants use a fuel source--for example, coal, 
natural gas, nuclear material such as uranium, or the sun--to boil 
water to produce steam. The steam turns a turbine connected to a 
generator that produces electricity. Traditionally, water has been 
withdrawn from a river or other water source to cool the steam back 
into liquid so it may be reused to produce additional electricity. Most 
of the water used by a traditional thermoelectric power plant is for 
this cooling process, but water may also be needed for other purposes 
in the plant such as for pollution control equipment. In 2000, 
thermoelectric power plants accounted for 39 percent of total U.S. 
freshwater withdrawals.[Footnote 3] EIA annually reports data on the 
water withdrawals, consumption and discharges of power plants of a 
certain size, as well as some information on water source and cooling 
technology type. These data are used by federal agencies and other 
researchers in estimating the overall power plant water use and 
determining how this use has and will continue to change. 

Information Is Limited on the Water Supply and Water Quality Impacts of 
the Next Generation of Biofuels: 

Our work to date indicates that while the water supply and water 
quality effects of producing corn-based ethanol are fairly well 
understood, less is known about the effects of the next generation of 
feedstocks and fuels. The cultivation of corn for ethanol production 
can require substantial quantities of water--from 7 to 321 gallons per 
gallon of ethanol produced--depending on where it is grown and how much 
irrigation water is used.[Footnote 4] Furthermore, corn is a relatively 
resource-intensive crop, requiring higher rates of fertilizer and 
pesticide applications than many other crops; some experts believe that 
additional corn production for biofuels conversion will lead to an 
increase in fertilizer and sediment runoff and in the number of 
impaired streams and other water bodies. Some researchers and 
conservation officials have told us that the impact of corn-based 
ethanol on water supply and water quality could be mitigated through 
research into developing additional drought-tolerant and more nutrient- 
efficient crop varieties thereby decreasing the amount of water needed 
for irrigation and the amount of fertilizer that needs to be applied. 
Furthermore, experts also mentioned the need for additional data on 
current aquifer water supplies and research on the potential of biofuel 
cultivation to strain these water sources. 

In contrast to corn-based ethanol, our work to date indicates that much 
less is known about the effects that large-scale cultivation of 
cellulosic feedstocks will have on water supplies and water quality. 
Since potential cellulosic feedstocks have not been grown commercially 
to date, there is little information on the cumulative water, nutrient, 
and pesticide needs of these crops, and it is not yet known what 
agricultural practices will actually be used to cultivate these 
feedstocks on a commercial scale. For example, while some experts 
assume that perennial feedstocks will be rainfed, other experts have 
pointed out that to achieve maximum yields for cellulosic crops, 
farmers may need to irrigate these crops. Furthermore, because water 
supplies vary regionally, additional research is needed to better 
understand geographical influences on feedstock production. For 
example, the additional withdrawals in states relying heavily on 
irrigation for agriculture, such as Nebraska, may place new demands on 
the Ogallala Aquifer, an already strained resource from which eight 
states draw water. In addition, if agricultural residues--such as corn 
stover--are to be used, this could negatively affect soil quality, 
increase the need for fertilizer, and lead to increased sediment runoff 
to waterways. Considerable uncertainty exists regarding the maximum 
amount of residue that can be removed for biofuels production while 
maintaining soil and water quality. USDA, DOE, and some academic 
researchers are attempting to develop new projections on how much 
residue can be removed without compromising soil quality, but 
sufficient data are not yet available to inform their efforts, and it 
may take several years to accumulate such data and disseminate it to 
farmers for implementation. Experts we spoke with generally agree that 
more research on how to produce cellulosic feedstocks in a sustainable 
way is needed. 

Our work also indicates that even less is known about newer biofuels 
feedstocks such as algae. Algae have the added advantage of being able 
to use lower-quality water for cultivation, according to experts. 
However, the impact on water supply and water quality will ultimately 
depend on which cultivation methods are determined to be the most 
viable. Therefore, research is needed on how best to cultivate this 
feedstock in order to maximize its potential as a biofuel feedstock and 
limit its potential impacts on water resources. Other areas we have 
identified that relate to water and algae cultivation in need of 
additional research include: 

* Oil extraction. Additional research is needed on how to extract the 
oil from the algal cell in such a way as to preserve the water 
contained in the cell along with the oil, thereby allowing some of that 
water to be recycled back into the cultivation process. 

* Contaminants. Information is needed on how to manage the contaminants 
that are found in the algal cultivation water and how any resulting 
wastewater should be handled. 

Uncertainty also exists regarding the water supply impacts of 
converting feedstocks into biofuels. Biorefineries require water for 
processing the fuel and need to draw from existing water resources. 
Water consumed in the corn-ethanol conversion process has declined over 
time with improved equipment and energy efficient design, according to 
a 2009 Argonne National Laboratory study, and is currently estimated at 
3 gallons of water required for each gallon of ethanol produced. 
However, the primary source of freshwater for most existing corn 
ethanol plants is from local groundwater aquifers and some of these 
aquifers are not readily replenished. For the conversion of cellulosic 
feedstocks, the amount of water consumed is less defined and will 
depend on the process and on technological advancements that improve 
the efficiency with which water is used. Current estimates range from 
1.9 to 5.9 gallons of water, depending on the technology used. Some 
experts we spoke with said that greater research is needed on how to 
manage the full water needs of biorefineries and reduce these needs 
further. Similar to current and next generation feedstock cultivation, 
additional research is also needed to better understand the impact of 
biorefinery withdrawals on aquifers and to consider potential resource 
strains when siting these facilities. 

Our work to date also indicates that additional research is needed on 
the storage and distribution of biofuels. Ethanol is highly corrosive 
and poses a risk of damage to pipelines, and underground and above- 
ground storage tanks, which could in turn lead to releases to the 
environment that may contaminate groundwater, among other issues. These 
leaks can be the result of biofuel blends being stored in incompatible 
tank systems--those that have not been certified to handle fuel blends 
containing more than 10 percent ethanol. While EPA currently has some 
research under way, additional study is needed into the compatibility 
of higher fuel blends, such as those containing 15 percent ethanol, 
with the existing fueling infrastructure. To overcome potential 
compatibility issues, future research is needed on other conversion 
technologies that can be used to produce renewable and advanced fuels 
that are capable of being used in the existing infrastructure. 

Key Efforts to Reduce Use of Freshwater at Power Plants May Not Be 
Fully Captured in Existing Federal Data: 

In our work to date, we have found (1) the use of advanced cooling 
technologies can reduce freshwater use at thermoelectric power plants, 
but federal data may not fully capture this industry change; (2) the 
use of alternative water sources can also reduce freshwater use, but 
federal data may not systematically capture this change; and (3) 
federal research under way is focused on examining efforts to reduce 
the use of freshwater in thermoelectric power plants. 

Advanced cooling technologies offer the promise to reduce freshwater 
use by thermoelectric power plants. Unlike traditional cooling 
technologies that use water to cool the steam in power plants, advanced 
cooling technologies carry out all or part of the cooling process using 
air. According to power plant developers, they consider using these 
water-conserving technologies in new plants, particularly in areas with 
limited available water supplies. While these technologies can 
significantly reduce the amount of water used in a plant--and in some 
cases eliminate the use of water for cooling--their use entails a 
number of challenges. For example, plants using advanced cooling 
technologies may cost more to build and operate; require more land; 
and, because these technologies can consume a significant amount of 
energy themselves, witness lower net electricity output--especially in 
hot, dry conditions. However, eliminating or minimizing freshwater use 
by incorporating an advanced cooling technology provides a number of 
potential benefits to plant developers, including minimizing the costs 
associated with acquiring, transporting, and treating water, as well as 
eliminating impacts on the environment associated with water 
withdrawals, consumption, and discharge. In addition, the use of these 
advanced cooling technologies may provide the flexibility to build 
power plants in locations not near a source of water. 

For these reasons, a number of power plant developers in the United 
States and across the world have adopted advanced cooling technologies, 
but according to EIA officials, the agency's forms have not been 
designed to collect information on the use of advanced cooling 
technologies. Moreover, the instruments the agency uses to collect 
these data were developed many years ago and have not been recently 
updated. EIA officials have told us that while some plants may choose 
to report this information, they may not do so consistently or in such 
a way that allows comprehensive identification of the universe of 
plants using advanced cooling technologies. Water experts and federal 
agencies we spoke to during the course of our work identified value in 
the annual EIA data on cooling technologies, but some explained that 
not having data on advanced cooling technologies limits public 
understanding of their prevalence and analysis of the extent to which 
their adoption results in a significant reduction in freshwater use. 
According to EIA officials, the agency is currently redesigning the 
instrument it uses to collect these data and expects to begin using the 
revised instrument in 2011. In addition, during the course of our work 
we noted that in 2002, EIA discontinued reporting water-related data 
for nuclear power plants, including water use and cooling technology. 
As we develop our final report, we will be looking at various 
suggestions that we can make to DOE to improve its data collection 
efforts. 

Our work to date also indicates that the use of alternative water 
sources can substantially reduce or eliminate the need to use 
freshwater for power plant cooling at an individual plant. Alternative 
water sources that may be usable for power plant cooling include 
treated effluent from sewage treatment plants; groundwater that is 
unsuitable for drinking or irrigation because it is high in salts or 
other impurities; industrial water, such as water generated when 
extracting minerals like oil, gas, and coal; and others. Use of these 
alternative water sources can ease the development process where 
freshwater sources are in short supply and lower the costs associated 
with obtaining and using freshwater when freshwater is expensive. 
Because of these advantages, alternative water sources play an 
increasingly important role in reducing power plant reliance on 
freshwater, but can pose challenges, including requiring special 
treatment to avoid adverse effects on cooling equipment, requiring 
additional efforts to comply with relevant regulations, and limiting 
the potential locations of power plants to those nearby an alternative 
water source. These challenges are similar to those faced by power 
plants that use freshwater, but they may be exacerbated by the lower 
quality of alternative water sources. 

Power plant developers we spoke with told us they routinely consider 
use of alternative water sources when developing their power plant 
proposals. Moreover, a 2007 report by Argonne National Laboratory 
indicates that the use of treated municipal wastewater at power plants 
has become more common, with 38 percent of power plants after 2000 
using reclaimed water. EIA collects annual data from power plants on 
their water use and water source. However, according to EIA officials, 
while some plants report using an alternative water source, many may 
not be reporting such information since EIA's data collection form was 
not designed to collect data on these freshwater alternatives. One 
expert we spoke with told us that not having data on the use of 
alternative water sources at power plants limits public understanding 
of these trends and the extent to which these approaches are effective 
in reducing freshwater use. As we develop our final report, we plan to 
also develop suggestions for DOE that can improve this data gathering 
process. 

Power plant developers may choose to reduce their use of freshwater for 
a number of reasons, such as when freshwater is unavailable or costly 
to obtain, to comply with regulatory requirements, or to address public 
concern. However, a developer's decision to deploy an advanced cooling 
technology or an alternative water source depends on an evaluation of 
the tradeoffs between the water savings and other benefits these 
alternatives offer and the cost involved. For example, where water is 
unavailable or prohibitively expensive, power plant developers may 
determine that despite the challenges, advanced cooling technologies or 
alternative water sources offer the best option for getting a 
potentially profitable plant built in a specific area. 

While private developers make key decisions on what types of power 
plants to build and where to build them, and how to cool them based on 
their views of the costs and benefits of various alternatives, 
government research and development can be a tool to further the use of 
alternative cooling technologies and alternative water supplies. In 
this regard, the Department of Energy's National Energy Technology 
Laboratory (NETL) plays a central role in DOE's research and 
development effort. In recent years, NETL has funded research and 
development projects through its Innovations for Existing Plants 
program aimed at minimizing the challenges of deploying advanced 
cooling technologies and using alternative water sources at existing 
plants, among other things. In 2008, DOE awarded about $9 million to 
support research and development of projects that, among other things, 
could improve the performance of advanced cooling technologies, recover 
water used to reduce emissions of air pollutants at coal plants for 
reuse, and facilitate the use of alternative water sources such as 
polluted water for cooling. Such research endeavors, if successful, 
could alter the trade-off analysis power plant developers conduct in 
favor of nontraditional alternatives to cooling. 

Concluding Observations: 

Ensuring sufficient supplies of energy and water will be essential to 
meeting the demands of the 21st century. This task will be particularly 
difficult, given the interdependency between energy production and 
water supply and water quality and the strains that both these 
resources currently face. DOE, together with other federal agencies, 
has a key role to play in providing key information, helping to 
identify ways to improve the productivity of both energy and water, 
partnering with industry to develop technologies that can lower costs, 
and analyzing what progress has been made along the way. While we 
recognize that DOE currently has a number of ongoing research efforts 
to develop information and technologies that will address various 
aspects of the energy-water nexus, our work indicates that there are a 
number of areas to focus future research and development efforts. 
Investments in these areas will provide information to help ensure that 
we are balancing energy independence and security with effective 
management of our freshwater resources. 

Mr. Chairman that concludes my prepared statement, I would be happy to 
respond to any questions that you or other Members of the Subcommittee 
might have. 

GAO Contact and Staff Acknowledgments: 

For further information on this testimony, please contact me at 202- 
512-3841 or mittala@gao.gov. Key staff contributors to this testimony 
were Jon Ludwigson, Assistant Director; Elizabeth Erdmann, Assistant 
Director; Scott Clayton; Paige Gilbreath; Miriam Hill; Randy Jones; 
Micah McMillan; Nicole Rishel; Swati Thomas; Lisa Vojta; and Rebecca 
Wilson. Contact points for our Office of Congressional Relations and 
Public Affairs may be found on the last page of this statement. 

[End of section] 

Footnotes: 

[1] For example, Range Fuels has operated a pilot biorefinery in 
Denver, Colo., since 2008 that has successfully converted pine and 
hardwoods into cellulosic ethanol. The company plans to optimize the 
technologies from this pilot plant at its cellulosic biorefinery, 
expected to begin commercial-scale production in 2010. This 
biorefinery, located in Soperton, Ga., is targeted to produce 
approximately 100 million gallons of ethanol and mixed alcohols from 
wood byproducts when it is at full scale. 

[2] The Energy Independence and Security Act of 2007, Pub. L. No. 110- 
140 (2007). 

[3] Water consumed by thermoelectric power plants accounts for a 
smaller percentage. 

[4] Wu, M., M. Mintz, M. Wang, and S. Arora. Consumptive Water Use in 
the Production of Ethanol and Petroleum Gasoline. Center for 
Transportation Research, Energy Systems Division, Argonne National 
Laboratory, January 2009. 

[End of section] 

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