Summer 2015 ENERGY, THE ENVIRONMENT, AND CLIMATE CHANGE The BRIDGE LINKING ENGINEERING AND SOCIETY Impacts on Resources and Climate of Projected Economic and Population Growth Patterns John M. Reilly Two or Three Degrees: CO2 Emissions and Global Temperature Impacts Robert B. Jackson, Pierre Friedlingstein, Josep G. Canadell, and Robbie M. Andrew Fugitive Emissions and Air Quality Impacts of US Natural Gas Systems Adam R. Brandt and Gabrielle Pétron The Future of Biofuel and Food Production in the Context of Climate Change and Emerging Resource Stresses Chris R. Somerville and Stephen P. Long The Solar Opportunity Nathan S. Lewis and Daniel G. Nocera Requirements for the Success of Civilian Nuclear Power in the United States Brittany L. Guyer and Michael W. Golay The mission of the National Academy of Engineering is to advance the well-being of the nation by promoting a vibrant engineering profession and by marshalling the expertise and insights of eminent engineers to provide independent advice to the federal government on matters involving engineering and technology. The BRIDGE NATIONAL ACADEMY OF ENGINEERING Charles O. Holliday, Jr., Chair C. D. Mote, Jr., President Corale L. Brierley, Vice President Thomas F. Budinger, Home Secretary Venkatesh Narayanamurti, Foreign Secretary Martin B. Sherwin, Treasurer Editor in Chief: Ronald M. Latanision Managing Editor: Cameron H. Fletcher Production Assistant: Penelope Gibbs The Bridge (ISSN 0737-6278) is published quarterly by the National Aca d emy of Engineering, 2101 Constitution Avenue NW, Washington, DC 20418. Periodicals postage paid at Washington, DC. Vol. 45, No. 2, Summer 2015 Postmaster: Send address changes to The Bridge, 2101 Constitution Avenue NW, Washington, DC 20418. Papers are presented in The Bridge on the basis of general interest and time- liness. They reflect the views of the authors and not necessarily the position of the National Academy of Engineering. The Bridge is printed on recycled paper. C © 2015 by the National Academy of Sciences. All rights reserved. A complete copy of The Bridge is available in PDF format at www.nae.edu/TheBridge. Some of the articles in this issue are also avail- able as HTML documents and may contain links to related sources of information, multimedia files, or other content. The Volume 45, Number 2 • Summer 2015 BRIDGE LINKING ENGINEERING AND SOCIETY Editors’ Notes 3 From the Editor in Chief Ronald M. Latanision 4 The Challenges of Meeting Energy Demands in Environmentally Responsible Ways Robert C. Armstrong, Guest Editor Features 6 Impacts on Resources and Climate of Projected Economic and Population Growth Patterns John M. Reilly Global development and population growth are projected to seriously stress natural resources and alter the climate as soon as 2050. 16 Two or Three Degrees: CO2 Emissions and Global Temperature Impacts Robert B. Jackson, Pierre Friedlingstein, Josep G. Canadell, and Robbie M. Andrew CO2 emissions are rising at a rate that could raise global temperature 2°C above preindustrial values in about 20 years and 3°C by midcentury. 22 Fugitive Emissions and Air Quality Impacts of US Natural Gas Systems Adam R. Brandt and Gabrielle Pétron Natural gas will be a useful alternative to coal and oil if fugitive methane emissions can be effectively monitored and mitigated. 32 The Future of Biofuel and Food Production in the Context of Climate Change and Emerging Resource Stresses Chris R. Somerville and Stephen P. Long As truly renewable fuels, advanced biofuels and sugarcane ethanol offer energy security far into the future. 41 The Solar Opportunity Nathan S. Lewis and Daniel G. Nocera Much progress has been made in developing a scalable technology for the use of solar energy, but significant challenges remain for all current technological approaches. 48 Requirements for the Success of Civilian Nuclear Power in the United States Brittany L. Guyer and Michael W. Golay Without substantially improving nuclear power, the United States is limited in its ability to enhance domestic energy and provide needed international leadership in mitigating climate change. (continued on next page) The BRIDGE 55 Op-Ed: Getting Off Fossil Fuels Michael W. Golay 57 An Interview with . Charley Johnson NAE News and Notes 65 NAE Newsmakers 66 NAE Honors 2015 Draper and Russ Prize Winners 70 Bernard M. Gordon Prize for Innovation in Engineering and Technology Education 72 Foreign Secretary and Councillors Elected 72 2015 German-American Frontiers of Engineering Held in Potsdam, Germany 74 North Carolina State University and NAE Hold Symposium: “The Continuum from Tissue Engineering Through Regenerative Medicine to Rehabilitation Engineering” 75 NAE Regional Meeting Hosted by University of Washington College of Engineering: “Reverse Engineering the Brain” 76 2015 Convocation of Professional Engineering Societies 77 Report and Toolkit from NAE-Sponsored Diversity Summit 78 Calendar of Meetings and Events 79 In Memoriam 80 Publications of Interest The National Academy of Sciences is a private, nonprofit, self- The Institute of Medicine was established in 1970 by the National perpetuating society of distin guished scholars engaged in scientific Acad e my of Sciences to secure the services of eminent members of and engineering research, dedicated to the furtherance of science and appropriate pro fes sions in the examination of policy matters pertaining technology and to their use for the general welfare. Upon the author- to the health of the public. The Institute acts under the responsibility ity of the charter granted to it by the Congress in 1863, the Academy given to the National Academy of Sciences by its congressional char- has a mandate that requires it to advise the federal gov ern ment on ter to be an adviser to the federal government and, upon its own scientific and technical matters. Dr. Ralph J. Cicerone is president of the initiative, to identify issues of medical care, research, and education. National Academy of Sciences. Dr. Victor J. Dzau is president of the Institute of Medicine. The National Academy of Engineering was established in 1964, The National Research Council was organized by the National under the charter of the Nation al Academy of Sciences, as a parallel Academy of Scienc es in 1916 to associate the broad community of organization of out stand ing engineers. It is autonomous in its adminis- science and technology with the Academy’s purposes of fur ther ing tration and in the selection of its members, sharing with the National knowledge and advising the federal government. Func tion ing in Academy of Sciences the responsibility for advising the federal gov - accordance with general policies determined by the Academy, the ernment. The National Academy of En gi neer ing also sponsors engi- Council has become the principal operating agency of both the neering programs aimed at meeting national needs, encourages edu- National Academy of Sciences and the National Academy of Engi- cation and research, and recognizes the superior achievements of neering in providing services to the government, the public, and the engineers. Dr. C. D. Mote, Jr., is president of the National Academy scientific and en gi neer ing communities. The Council is administered of Engineering. jointly by both Academies and the Institute of Medicine. Dr. Ralph J. Cicerone and Dr. C. D. Mote, Jr., are chair and vice chair, respec- tively, of the National Research Council. www.national-academies.org FALL 2006 3 From the Editor in Chief We also introduce in this issue a new dimension for the Bridge, op-eds. We now believe, based on the number of comments that we receive from our readers, that an op-ed column is a useful addition. It gives us the flexibility to accommodate viewpoints other than those expressed by our authors and to introduce in a timely manner a perspective or opinion on matters of Ronald M. Latanision (NAE) is a importance to our readers that go beyond what appears senior fellow at Exponent, Inc. in in a given thematic issue. Natick, MA. We are mindful that this must be managed carefully, and so have crafted the following guidelines: First, I want to thank guest editor Bob Armstrong for • We have adopted the standard of major daily newspa- assembling a superb issue on the challenges in moving pers, namely, that submissions of any length are wel- forward to meet both the growing demand for energy comed, but those longer than 800 words are unlikely and the growing concern of global warming and its to be accepted. impacts on the lives of those who do and who will • The editors reserve the right to determine what we inhabit the Earth. publish in this column. In this issue we continue with our interviews of engineers who have affected the culture of this nation • We do not wish to constrain expression or opinion, in many ways beyond what one typically envisions of but we do wish to avoid overt commercial endorse- engineers. Recent issues presented interviews with ment or political partisanship. poet Richard Blanco, former New Hampshire governor • We will include the op-ed author’s email address as a and chief of staff of the Bush (41) White House John means of stimulating meaningful dialogue with read- Sununu, and writer Henry Petroski. This issue features ers. As such, we will include the following footnote former NFL player Charley Johnson. to that effect: “Readers wishing to comment on this Charley has had a remarkable career: he is a PhD piece are invited to contact the author (email) and/ chemical engineer who was an NFL quarterback, a or the editor in chief (email).” professor of chemical engineering, and the founder of a compressor company that served the oil and gas Our first op-ed, by Michael Golay, professor of industry. As always, managing editor Cameron Fletcher nuclear science and engineering at the Massachusetts joined me in the conversation.