Climate change
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Voluntary opt-in programs to reduce emissions in unregulated sectors or countries have spurred considerable discussion. Since any regulator will make errors in predicting baselines and participants will self-select into the program, adverse selection will reduce efficiency and possibly environmental integrity. In contrast, pure subsidies lead to full participation but require large financial transfers.

We present a simple model to analyze this trade-off between adverse selection and infra-marginal transfers. We find that increasing the scale of voluntary programs both improves efficiency and reduces transfers. We show that discounting (paying less than full value for offsets) is inefficient and cannot be used to reduce the fraction of offsets that are spurious while setting stringent baselines generally can. Both approaches reduce the cost to the offsets buyer. The effects of two popular policy options are less favorable than many believe: Limiting the number of offsets that can be one-for-one exchanged with permits in a cap-and-trade system will lower the offset price but also quality. Trading ratios between offsets and allowances have ambiguous environmental effects if the cap is not properly adjusted. This paper frames the issues in terms of avoiding deforestation but the results are applicable to any voluntary offset program.

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Program on Energy and Sustainable Development
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Biomass-derived energy offers the potential to increase energy security while mitigating anthropogenic climate change, but a successful path toward increased production requires a thorough accounting of costs and benefits. Until recently, the efficacy of biomass-derived energy has focused primarily on biogeochemical consequences. Here we show that the biogeophysical effects that result from hypothetical conversion of annual to perennial bioenergy crops across the central United States impart a significant local to regional cooling with considerable implications for the reservoir of stored soil water. This cooling effect is related mainly to local increases in transpiration, but also to higher albedo. The reduction in radiative forcing from albedo alone is equivalent to a carbon emissions reduction of 78 t C ha-1 , which is six times larger than the annual biogeochemical effects that arise from offsetting fossil fuel use. Thus, in the near-term, the biogeophysical effects are an important aspect of climate impacts of biofuels, even at the global scale. Locally, the simulated cooling is sufficiently large to partially offset projected warming due to increasing greenhouse gases over the next few decades. These results demonstrate that a thorough evaluation of costs and benefits of bioenergy-related land-use change must include potential impacts on the surface energy and water balance to comprehensively address important concerns for local, regional, and global climate change.

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Proceedings of the National Academy of Sciences
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Matei Georgescu
David Lobell
Christopher B. Field
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Stanford experts from a range of disciplines discuss the interconnections and interactions among humanity's needs for and use of food, energy, water, and environment. Drawing on their own research, the speakers will illustrate and evaluate some of the ways in which decisions in one resource area can lead to trade-offs or co-benefits in others. Symposium attendees participate in breakout sessions, led by Stanford students and faculty, on a range of challenges associated with sustainable food systems.

Stanford faculty participants include: Stacey Bent (Center on Nanostructuring for Efflicient Energy Conversion) Welcome; Roz Naylor (Program on Food Security and the Environment, Woods Institute for the Environment) The Global Food Challenge; Chris Field (Carnegie Institution Department of Global Ecology) The Food-Energy Nexus; David Lobell (Program on Food Security and the Environment, Woods Institute for the Environment) The Food-Climate Nexus; Buzz Thompson (Woods Institute for the Environment) The Food-Water Nexus; Mariano-Florentino Cuellar (Center for International Security and Cooperation, Freeman Spogli Institute for International Studies) The Food-Security Nexus; and Pamela Matson (School of Earth Sciences) The Way Forward. Breakout session topics include how to lower the carbon footprint of food, aquaculture, and how to make meat more sustainable.

Bishop Auditorium
518 Memorial Way
Stanford, CA 94305

The Jerry Yang and Akiko Yamazaki
Environment and Energy Building
Stanford University
473 Via Ortega, Office 363
Stanford, CA 94305

(650) 723-5697 (650) 725-1992
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Senior Fellow, Stanford Woods Institute and Freeman Spogli Institute for International Studies
William Wrigley Professor of Earth System Science
Senior Fellow and Founding Director, Center on Food Security and the Environment
Roz_low_res_9_11_cropped.jpg PhD

Rosamond Naylor is the William Wrigley Professor in Earth System Science, a Senior Fellow at Stanford Woods Institute and the Freeman Spogli Institute for International Studies, the founding Director at the Center on Food Security and the Environment, and Professor of Economics (by courtesy) at Stanford University. She received her B.A. in Economics and Environmental Studies from the University of Colorado, her M.Sc. in Economics from the London School of Economics, and her Ph.D. in applied economics from Stanford University. Her research focuses on policies and practices to improve global food security and protect the environment on land and at sea. She works with her students in many locations around the world. She has been involved in many field-level research projects around the world and has published widely on issues related to intensive crop production, aquaculture and livestock systems, biofuels, climate change, food price volatility, and food policy analysis. In addition to her many peer-reviewed papers, Naylor has published two books on her work: The Evolving Sphere of Food Security (Naylor, ed., 2014), and The Tropical Oil Crops Revolution: Food, Farmers, Fuels, and Forests (Byerlee, Falcon, and Naylor, 2017).

She is a Fellow of the Ecological Society of America, a Pew Marine Fellow, a Leopold Leadership Fellow, a Fellow of the Beijer Institute for Ecological Economics, a member of Sigma Xi, and the co-Chair of the Blue Food Assessment. Naylor serves as the President of the Board of Directors for Aspen Global Change Institute, is a member of the Scientific Advisory Committee for Oceana and is a member of the Forest Advisory Panel for Cargill. At Stanford, Naylor teaches courses on the World Food Economy, Human-Environment Interactions, and Food and Security. 

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Rosamond L. Naylor Speaker

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Phone: 650.736.4352

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Perry L. McCarty Director of the Stanford Woods Institute for the Environment.; Professor for Interdisciplinary Environmental Studies, School of Earth, Energy & Environmental Sciences; FSI Senior Fellow, by courtesy
chris_field.png PhD

Chris Field is the Perry L. McCarty Director of the Stanford Woods Institute for the Environment.

His research focuses on climate change, ranging from work on improving climate models, to prospects for renewable energy systems, to community organizations that can minimize the risk of a tragedy of the commons.

Field has been deeply involved with national and international scale efforts to advance science and assessment related to global ecology and climate change. He served as co-chair of Working Group II of the Intergovernmental Panel on Climate Change from 2008-2015, where he led the effort on the IPCC Special Report on “Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation” (2012) and the Working Group II contribution to the IPCC Fifth Assessment Report (2014) on Impacts, Adaptation, and Vulnerability.

Field assumed leadership of the Stanford Woods Institute for the Environment in September 2016. His other appointments at Stanford University include serving as the Melvin and Joan Lane Professor for Interdisciplinary Environmental Studies in the School of Humanities and Sciences; Professor of Earth System Science in the School of Earth, Energy & Environmental Sciences; and Senior Fellow with the Precourt Institute for Energy. Prior to his appointment as Woods' Perry L. McCarty Director, Field served as director of the Carnegie Institution for Science's Department of Global Ecology, which he founded in 2002. Field's tenure at the Carnegie Institution dates back to 1984.

His widely cited work has earned many recognitions, including election to the U.S. National Academy of Sciences, the Max Planck Research Award, the American Geophysical Union’s Roger Revelle Medal and the Stephen H. Schneider Award for Outstanding Science Communication. He is a fellow of the American Academy of Arts and Sciences, the American Association for the Advancement of Science, and the Ecological Society of America.

Field holds a bachelor’s degree in biology from Harvard College and earned his Ph.D. in biology from Stanford in 1981.

Christopher Field Speaker

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Professor, Earth System Science
Senior Fellow at the Freeman Spogli Institute for International Studies
Senior Fellow at the Stanford Woods Institute for the Environment
Senior Fellow at the Stanford Institute for Economic Policy Research (SIEPR)
Affiliate, Precourt Institute of Energy
shg_ff1a1284.jpg PhD

David Lobell is the Benjamin M. Page Professor at Stanford University in the Department of Earth System Science and the Gloria and Richard Kushel Director of the Center on Food Security and the Environment. He is also the William Wrigley Senior Fellow at the Stanford Woods Institute for the Environment, and a senior fellow at the Freeman Spogli Institute for International Studies (FSI) and the Stanford Institute for Economic Policy and Research (SIEPR).

Lobell's research focuses on agriculture and food security, specifically on generating and using unique datasets to study rural areas throughout the world. His early research focused on climate change risks and adaptations in cropping systems, and he served on the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report as lead author for the food chapter and core writing team member for the Summary for Policymakers. More recent work has developed new techniques to measure progress on sustainable development goals and study the impacts of climate-smart practices in agriculture. His work has been recognized with various awards, including the Macelwane Medal from the American Geophysical Union (2010), a Macarthur Fellowship (2013), the National Academy of Sciences Prize in Food and Agriculture Sciences (2022) and election to the National Academy of Sciences (2023).

Prior to his Stanford appointment, Lobell was a Lawrence Post-doctoral Fellow at Lawrence Livermore National Laboratory. He holds a PhD in Geological and Environmental Sciences from Stanford University and a Sc.B. in Applied Mathematics from Brown University.

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David Lobell Speaker

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Robert E. Paradise Professor of Natural Resources Law
buzz.jpg JD

A leading expert in environmental and natural resources law and policy, Barton H. “Buzz” Thompson, Jr., JD/MBA ’76 (BA ’72), has contributed a large body of scholarship on environmental issues ranging from the future of endangered species and fisheries to the use of economic techniques for regulating the environment. He is the founding director of the law school’s Environmental and Natural Resources Program, Perry L. McCarty Director and senior fellow of the Woods Institute for the Environment, and a senior fellow (by courtesy) at the Freeman Spogli Institute for International Studies. In 2008, the Supreme Court appointed Professor Thompson to serve as the special master in Montana v. Wyoming (137 Original). Professor Thompson is chairman of the board of the Resources Legacy Fund and the Resources Legacy Fund Foundation, a California trustee for The Nature Conservancy, and a board member of both the American Farmland Trust and the Sonoran Institute. He previously served as a member of the Science Advisory Board for the U.S. Environmental Protection Agency.

Before joining the Stanford Law School faculty in 1986, he was a partner at O’Melveny & Myers in Los Angeles and a lecturer at the UCLA School of Law. He was a law clerk to Chief Justice William H. Rehnquist ’52 (BA ’48, MA ’48) of the U.S. Supreme Court and Judge Joseph T. Sneed of the U.S. Court of Appeals for the Ninth Circuit.

Senior Fellow, Stanford Woods Institute for the Environment, and (by courtesy) the Freeman Spogli Institute for International Studies
Barton H. Thompson Speaker
Mariano-Florentino Cuéllar Speaker
Pamela A. Matson Dean of the School of Earth Sciences, Goldman Professor of Geological and Environmental Sciences and FSI Senior Fellow Speaker Stanford University
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Speaking to key decision makers from the Department of Energy and the Department of State, Morse analyzed how to address the fact that coal is now both the leading fuel of choice in the developing world (passing oil in 2006) and the leading cause of climate change. 

Morse offered two strategic frameworks for US policy to reduce emissions from coal-fired power: substitution and decoupling. 

Under the substitution strategy, Morse compared the relative costs and carbon mitigation potential of a portfolio of alternative baseload power generation technologies that could be deployed in the developing world, taking into account political and resource constraints in key countries such as China and India. 

Under the decoupling strategy, Morse analyzed the options for carbon capture and storage compared to the mitigation potential of increasing the combustion efficiency of the existing coal fleet.  Drawing on PESD analysis of coal, power, and gas markets in the developing world, PESD put forward pragmatic strategies to US Government officials that could reduce carbon emissions at scale, without waiting on the emergence of a global carbon market.

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Climate volatility could change in the future, with important implications for agricultural productivity. For Tanzania, where food production and prices are sensitive to climate, changes in climate volatility could have severe implications for poverty. This study uses climate model projections, statistical crop models, and general equilibrium economic simulations to determine how the vulnerability of Tanzania's population to impoverishment by climate variability could change between the late 20th Century and the early 21st Century. Under current climate volatility, there is potential for a range of possible poverty outcomes, although in the most extreme of circumstances, poverty could increase by as many as 650,000 people due to an extreme interannual decline in grain yield. However, scenarios of future climate from multiple climate models indicate no consensus on future changes in temperature or rainfall volatility, so that either an increase or decrease is plausible. Scenarios with the largest increases in climate volatility are projected to render Tanzanians increasingly vulnerable to poverty through impacts on staple grains production in agriculture, with as many as 90,000 additional people entering poverty on average. Under the scenario where precipitation volatility decreases, poverty vulnerability decreases, highlighting the possibility of climate changes that oppose the ensemble mean, leading to poverty impacts of opposite sign. The results suggest that evaluating potential changes in volatility and not just the mean climate state may be important for analyzing the poverty implications of climate change.

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Global Environmental Change
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Thomas Hertel
David Lobell
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David Lobell
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With 2011 already off to such a wet start in many parts of the world, concerns of what flooding will do to food prices and availability in the coming months are starting to creep into the news. In Sri Lanka, flooding has devastated rice crops, and in North Dakota, heavy rain and snow is already threatening the spring wheat crop. And all this after last summer's Russian drought and heat wave helped drive global wheat prices higher.

But while farmers have always had to contend with the vagaries of the weather, a question of increasing importance is how agriculture will be affected by the climate changes projected to occur over the next century. Many scientists are studying which regions of the world may be impacted the most by increasing temperatures and changing precipitation regimes, and what is bound to happen to the supplies of the world's biggest cash crops, like wheat, corn, rice and soybeans.

A new report, The Food Gap, was released last week from the Universal Ecological Fund, and it has muddied the waters even further. The report reviews how global climate change will affect the fate of crop yields and food prices in 2020. Unfortunately, the report actually misinterpreted the connection between atmospheric concentrations of greenhouse gases like carbon dioxide (CO2) and expected global temperature increases - despite the fact that recent reports from the U.N. Intergovernmental Panel on Climate Change and the National Academy of Sciences clearly identify the most current peer-reviewed understanding of this. The food study suggests that within 9 years, average global temperatures will be an average of 2.4°C warmer than during preindustrial times - or almost 1.5°C warmer than it was just last year.

This exceptionally high temperature projection is completely baseless, as NASA climate modeler Gavin Schmidt explained on the RealClimate blog - it's more likely that the planet will experience this kind of temperature change over 100 years, not merely one decade. Nevertheless, a number of news outlets published stories on the report's projections of how this dramatic climate change could impact the global food supply by 2020. Some publications posted corrections to their own stories, but I thought it would be helpful to take a step back and examine climate change and food security in 2020 and beyond. I spoke with Stanford University's David Lobell, who studies how climate change affects crop yields and food prices. He helped clarify what the current research says about climate change and food security.

Read the full interview here.

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