Meet Our Bloggers

Adrienne Alvord

Director, California & Western States

Adrienne Alvord is UCS’s California and Western states director working to ensure a clean, de-carbonized energy and fuels economy that promotes equitable economic growth and improves public health in western states. See Adrienne's full bio.

Don Anair

Research and deputy director, Clean Vehicles

Don Anair is a senior engineer with expertise on diesel, hybrid and battery electric vehicle, and goods movement technologies and the policies needed to turn them into real solutions for U.S. oil dependence, air pollution and global warming. He holds a master’s degree in electrical engineering. See Don's full bio.

Angela Anderson

Director of Climate & Energy

Angela Anderson is the director of the Climate and Energy Program. She leads UCS efforts to persuade government officials to enact policies that encourage clean energy and result in global warming emission reductions. Ms. Anderson advocates on international policy responses to the threat of global climate change. See Angela's full bio.

Jason Barbose

Western states policy manager

Jason advocates for UCS’s policy priorities in California and other western states. He meets with government officials, builds partnerships with allies, and helps manage legislative and regulatory campaigns to advance UCS priorities on climate change, energy, and transportation issues.

Doug Boucher

Scientific adviser, Climate and Energy

Doug Boucher is an expert in preserving tropical forests to curtail global warming emissions. He has been participating in United Nations international climate negotiations since 2007 and his expertise has helped shape U.S. and U.N. policies. He holds a Ph.D. in ecology and evolutionary biology from the University of Michigan. See Doug's full bio.

Astrid Caldas

Climate scientist

Astrid Caldas is a climate scientist with the Climate & Energy program at the Union of Concerned Scientists. Her research focuses on climate change adaptation with practical policy implications for ecosystems, the economy, and society. See Astrid's full bio

Jacob Carter

Research scientist, Center for Science and Democracy

Jacob Carter is a research scientist for the Center for Science and Democracy at the Union of Concerned Scientists. In this role, Dr. Carter investigates how science is used in the policy-making process, focusing on issues of scientific integrity across the federal government. See Jacob's full bio.

Rachel Cleetus

Lead economist and climate policy manager

Rachel Cleetus is an expert on the design and economic evaluation of climate and energy policies, as well as the costs of climate change. She holds a Ph.D. in economics. See Rachel's full bio.

Steve Clemmer

Director of energy research, Clean Energy

Steve Clemmer is the director of energy research and an expert on the economic and environmental benefits of implementing renewable energy technologies and policies at the state and national levels. He holds a master’s degree in energy analysis and policy from the University of Wisconsin. See Steve's full bio.

Jessica Collingsworth

Policy analyst, Clean Energy

Jessica Collingsworth is an energy policy analyst with expertise in state-level policies that curb global warming emissions through greater use of renewable energy and energy efficiency. See Jessica's full bio.

Dave Cooke

Senior vehicles analyst

Dave Cooke is a senior vehicles analyst in the Clean Vehicles Program, specializing in both light- and heavy-duty fuel economy. He conducts research on fuel efficiency technologies and the implications for oil consumption and greenhouse gas emissions across the transportation sector. See Dave's full bio.

Rob Cowin

Director of gov't affairs, Climate & Energy

Rob Cowin creates and implements legislative campaigns to support UCS efforts on clean energy, global warming, and nuclear safety issues. See Rob's full bio.

Kristy Dahl

Climate scientist

Kristina Dahl is a climate scientist who designs, executes, and communicates scientific analyses that make climate change more tangible to the general public and policy makers. Her research focuses on the impacts of climate change--particularly sea level rise--on people and the places and institutions they care about. Dr. Dahl holds a Ph.D. in paleoclimate from the MIT/WHOI Joint Program in Cambridge and Woods Hole, Massachusetts.

Juan Declet-Barreto

Kendall Science Fellow

Juan Declet-Barreto is a joint Kendall Science Fellow for the UCS Climate & Energy program and the Center for Science and Democracy. He partners with environmental justice groups and activists to research the potential effects of carbon trading on disadvantaged communities, as individual states begin implementation of the EPA’s Clean Power Plan. See Juan's full bio.

Marcia DeLonge

Senior scientist

Marcia DeLonge is a senior scientist in the Food & Environment Program at the Union of Concerned Scientists (UCS). Dr. DeLonge conducts scientific research and analyses identifying practices that lead to healthy, sustainable food and farming systems. See Marcia's full bio.

Jeff Deyette

Director of state policy & analysis, Clean Energy

Jeff Deyette is the director of state policy and analysis and has expertise on the economic and environmental implications of renewable energy and energy efficiency policies at the state and federal level. He holds a master’s degree in energy resource and environmental management & international relations. See Jeff's full bio.

Brenda Ekwurzel

Senior climate scientist

Brenda Ekwurzel is a senior climate scientist and the director of climate science at UCS. She has expertise on many aspects of climate variability, including the Arctic Ocean and sea ice, wildfires, groundwater, and coastal erosion. She holds a Ph.D. in isotope geochemistry from Columbia University (Lamont-Doherty Earth Observatory). See Brenda's full bio.

Peter Frumhoff

Director of science & policy

Peter Frumhoff is a global change ecologist and serves as chief scientist for the UCS climate campaign. Dr. Frumhoff is an internationally-recognized expert on climate change impacts, climate science and policy, tropical forest conservation and management, and biological diversity. He holds a Ph.D. in Ecology. See Peter's full bio.

Paula Garcia

Energy analyst

Paula Garcia is an energy analyst in the Climate and Energy Program at the Union of Concerned Scientists. She evaluates energy resource- and climate change mitigation- options in the electricity sector and works to advance public understanding of renewable and conventional energy technologies, policies and markets. See Paula's full bio.

Daniel Gatti

Policy analyst

Daniel Gatti is a policy analyst for the Clean Vehicles program at the Union of Concerned Scientists. Gatti’s work is focused on efforts to reduce emissions in the transportation sector in the Northeast region, through electrification, efficiency, and clean fuels. See Daniel's full bio.

Gretchen Goldman

Research Director, Center for Science and Democracy

Gretchen Goldman is a research director in the Center for Science and Democracy at UCS. She holds a PhD and MS in environmental engineering from the Georgia Institute of Technology and a BS in atmospheric science from Cornell University. See Gretchen's full bio. Follow her on Twitter at @GretchenTG.

Josh Goldman

Senior policy analyst, Clean Vehicles

Josh Goldman is a senior policy analyst, managing legislative and regulatory campaigns to help develop and advance policies that reduce U.S. oil use. See Josh's full bio.

Sam Gomberg

Senior energy analyst

Sam Gomberg is a senior energy analyst and an expert on responsible energy policies that support the development of renewable energy and energy efficiency resources that result in significant reductions of global warming emissions. See Sam's full bio.

Lisbeth Gronlund

Physicist & co-director, Global Security

Lisbeth Gronlund is a physicist and co-director of the Global Security Program. She is an expert on technical issues related to U.S. nuclear weapons policy, and new nuclear weapons, space weapons, and ballistic missile defenses. See Lisbeth's full bio. Lisbeth also blogs on All Things Nuclear.

Michael Halpern

Deputy director, Center for Science & Democracy

Michael Halpern is an expert on political interference in science and solutions to reduce suppression, manipulation, and distortion of government science. See Michael's full bio.

Jonna Hamilton

Sr. Washington Representative

Jonna Hamilton is the senior Washington representative in the Clean Vehicles Program at the Union of Concerned Scientists (UCS). In that role, she leads interactions with Congress, executive branch agencies, and the White House on topics pertaining to fuel efficient cars, electric vehicles, and fuels policy. See Jonna's full bio.

Katharine Hayhoe

Director, Climate Science Center, Texas Tech University

Katharine Hayhoe is a climate scientist and director of the Climate Science Center, Texas Tech University Lubbock, TX.

Derrick Z. Jackson

Fellow

Derrick Z. Jackson is a UCS Fellow in climate and energy and the Center for Science and Democracy. He is an award-winning journalist and co-author and photographer of Project Puffin: The Improbable Quest to Bring a Beloved Seabird Back to Egg Rock, published by Yale University Press (2015). See Derrick's full bio.

Mike Jacobs

Senior energy analyst, Climate & Energy Program

Michael Jacobs is a senior energy analyst with expertise in electricity markets, transmission and renewables integration work. See Mike's full bio.

Charise Johnson

Researcher, Center for Science & Democracy

Charise Johnson is a research associate in the Center for Science and Democracy at the Union of Concerned Scientists. She works primarily in partnership with justice-based groups, providing analysis that connects data-driven research with public health and community impacts. See Charise's full bio.

Ken Kimmell

President

Ken Kimmell is president of the Union of Concerned Scientists and has more than 30 years of experience in government, environmental policy, and advocacy. He is a national advocate for clean energy and transportation policies and a driving force behind UCS’s “Power Ahead” campaign to build a large and diverse group of clean energy leadership states. Prior to joining UCS in May 2014, Mr. Kimmell was the Commissioner of the Massachusetts Department of Environmental Protection (MassDEP), and served as chairman of the board of the Regional Greenhouse Gas Initiative. See Ken's full bio.

Yogin Kothari

Washington representative, Center for Science and Democracy

Yogin Kothari is a Washington representative with the Center for Science and Democracy at the Union of Concerned Scientists. He advocates for science-based policy solutions on a number of issues, including the regulatory process, endangered species, and chemical safety. He also works to reduce political interference in federal science and increase transparency and accountability. A graduate of George Washington University, Kothari been with UCS since 2011. Previously, he worked on Capitol Hill before serving as lead assistant director at Grassroots Campaigns. See Yogin's full bio.

Gregory Kulacki

China project manager and senior analyst

Gregory has lived and worked in China for the better part of the last twenty-five years facilitating exchanges between academic, governmental, and professional organizations in both countries. Since joining the Union of Concerned Scientists in 2002, he has focused on promoting and conducting dialog between Chinese and American experts on nuclear arms control and space security. His areas of expertise are Chinese foreign and security policy, Chinese space program, international arms control, cross-cultural communication. He received his Ph.D. in Political Theory from the University of Maryland, College Park in 1994. See Gregory's full bio. Gregory also blogs on All Things Nuclear.

Michael Latner

Kendall Science Fellow

Michael Latner is a Kendall Voting Rights Fellow with the Center for Science and Democracy. His research focuses on political representation and electoral systems. His most recent work has focused on redistricting and gerrymandering in the United States, and the impact of electoral administrative law on political participation. Michael holds a Ph.D. in political science from the University of California at Irvine, and is an associate professor of political science at California State Polytechnic University, where he recently directed the Masters in Public Policy program.

Mike Lavender

Senior Washington representative, Food & Environment

Mike Lavender is the senior Washington representative for the Union of Concerned Scientists’ Food & Environment program, where he advocates for a healthy, sustainable, and socially equitable food system. See Mike's full bio.

Rachel Licker

Senior climate scientist

Rachel Licker is a senior climate scientist with the Climate & Energy Program at the Union of Concerned Scientists. In her role, Dr. Licker communicates climate science to policymakers, the public, and the media. She analyzes new developments in climate science and works to defend climate science budgets and programs. See Rachel's full bio.

Adam Markham

Deputy director, Climate & Energy Program

Adam Markham is deputy director of the Climate and Energy Program at the Union of Concerned Scientists. He is leading efforts to build a national Climate Impacts Collaborative and working with a broad array of stakeholders to focus the attention of policy makers and others on local climate impacts and the need for effective resilience strategies and policy solutions.See Adam's full bio.

Jeremy Martin

Senior scientist, Clean Vehicles

Jeremy Martin is a scientist with expertise in the technology, lifecycle accounting, and water use of biofuels. He is working on policies to help commercialize the next generation of clean biofuels (made from waste and biomass rather than food) that can cut U.S. oil dependence and curb global warming. He holds a Ph.D. in chemistry with a minor in chemical engineering. See Jeremy's full bio.

Julie McNamara

Energy analyst

Julie McNamara is an energy analyst with the Climate & Energy program at the Union of Concerned Scientists. In her role, she analyzes state, regional, and national policies relating to clean energy development and deployment. Ms. McNamara holds an M.S. in technology and policy from MIT, and a B.A. in biology and political economy from Williams College. See Julie's full bio.

Alden Meyer

Director of strategy & policy

Alden Meyer has more than 30 years of experience on energy and climate policy. He is internationally recognized expert on U.S. and international climate policy. He also works extensively on renewable energy and electricity policy at the federal and state level. See Alden's full bio.

Kathy Mulvey

Climate accountability campaign manager

Kathy Mulvey leads strategic development of UCS’s climate corporate accountability campaign, guides engagement with corporate targets, builds national and international coalitions, and mobilizes experts and supporters. See Kathy's full bio.

Elliott Negin

Senior writer

Elliott handles media relations for the Nuclear Power and Global Security programs. He also regularly writes for the Huffington Post and other publications on UCS-related topics. See Elliott's full bio.

Jimmy O'Dea

Vehicles analyst

Jimmy O’Dea is a vehicles analyst in the Clean Vehicles program at the Union of Concerned Scientists. He is an expert on cleaner vehicle and freight technologies and policies. See Jimmy's full bio.

Karen Perry Stillerman

Senior analyst, Food and Environment

Karen Perry Stillerman is an analyst and advocate for transforming the U.S. agriculture and food system to one that produces affordable, healthful foods for consumers; reduces air and water pollution; and builds healthy soil for the farmers of tomorrow. She holds a master's degree in public affairs and environmental policy. See Karen's full bio.

Genna Reed

Science and policy analyst, Center for Science and Democracy

Genna Reed is a science and policy analyst in the Center for Science and Democracy at the Union of Concerned Scientists. In her role, she researches political and corporate influences on science-informed decision making—working to inform the public about issues where science is stifled or obscured, and to ensure that federal, state, and local policies are based on rigorous, independent science. See Genna's full bio.

David Reichmuth

Senior engineer, Clean Vehicles

David Reichmuth is a senior engineer in the Clean Vehicles Program, focusing on oil savings and vehicle electrification. See Dave's full bio.

Sarah Reinhardt

Food Systems & Health Analyst

Sarah Reinhardt is the food systems and health analyst for the Food & Environment program at the Union of Concerned Scientists. In her role, she applies her academic expertise in nutrition and her practical experience in equitable and sustainable food systems to support increased consumer access to healthy foods, and the development of a comprehensive national food policy.See Sarah's full bio.

Kathleen Rest

Executive director

As executive director of UCS, Dr. Kathleen Rest leads the organization, overseeing programs and operations, drawing upon a wealth of experience in government, academia, and the nonprofit sector to help guide the organization on issues ranging from climate change to global security. See Kathleen's full bio.

Jeremy Richardson

Senior energy analyst

Jeremy Richardson is a senior energy analyst in the Climate and Energy program, conducting analytical work on the Environmental Protection Agency’s carbon regulations. Prior to this position, Dr. Richardson was a Kendall Science Fellow and researched the fundamental cultural and economic drivers of coal production in West Virginia. He has a Ph.D. and M.S. in physics from the University of Colorado at Boulder as well as a B.S. in Physics from West Virginia University. Subscribe to Jeremy's posts

Michelle Robinson

Director of Clean Vehicles

Michelle Robinson has more than 25 years of experience in public policy and advocacy. She joined the Clean Vehicles program in 1992 and is a nationally recognized expert on state and federal transportation policy. See Michelle's full bio.

John Rogers

Senior energy analyst, Clean Energy

John Rogers is a senior energy analyst with expertise in renewable energy and energy efficiency technologies and policies. He co-manages the Energy and Water in a Warming World Initiative (EW3) at UCS that looks at water demands of energy production in the context of climate change. He holds a master’s degree in mechanical engineering from the University of Michigan and a bachelor's degree from Princeton University. See John's full bio.

Jamesine Rogers Gibson

Western states senior climate analyst

Jamesine Rogers Gibson is the Western states senior climate analyst for the Climate & Energy program at the Union of Concerned Scientists. Ms. Rogers Gibson conducts research and policy analysis to inform and build support for robust climate policies in California and the Western states. See Jamesine's full bio.

Andrew Rosenberg

Director, Center for Science & Democracy

Andrew Rosenberg is the director of the UCS Center for Science and Democracy. He leads UCS's efforts to advance the essential role that science, evidence-based decision making, and constructive debate play in American policy making. See Andrew's full bio.

Ricardo Salvador

Director, Food & Environment Program

Ricardo Salvador is an internationally renowned agronomist with more than 20 years of experience working to build a healthier food system. Dr. Salvador directs UCS’s Food and Environment Program. See Ricardo's full bio.

Erika Spanger-Siegfried

Senior analyst, Climate & Energy Program

Erika Spanger-Siegfried, a senior analyst in the Climate and Energy program at the Union of Concerned Scientists, researches, writes and speaks about U.S. climate change impacts and preparedness.She holds a master’s degree in energy and environmental analysis from Boston University and a B.S. in fisheries biology from the University of Massachusetts Amherst.. See Erika's full bio.

Shana Udvardy

Climate Preparedness Specialist

Shana Udvardy is the climate preparedness specialist with the Climate & Energy program at the Union of Concerned Scientists. She conducts research and policy analysis to help inform and build support to increase resilience to climate change impacts. Ms. Udvardy is a Certified Floodplain Manager, and holds a M.S. in Conservation Ecology and Sustainable Development from the University of Georgia’s Odum School of Ecology and a B.A. from Syracuse University’s Maxwell School. See Shana's full bio.

Laura Wisland

Senior analyst, Clean Energy

Laura Wisland is a senior energy analyst and an expert on California renewable energy policies. She holds a master’s degree in public policy. See Laura's full bio.

David Wright

Physicist & co-director, Global Security

David Wright is a physicist and the co-director of the Global Security Program. He is a nationally known expert on the technical aspects of missile defense systems, missile proliferation, and space weapons. See David's full bio.David also blogs on All Things Nuclear.

Guest Commentary

Leading experts from a variety of fields bring their insights to The Equation, providing guest commentary on a broad range of issues that connect to our work. Views expressed here belong to the authors, not UCS.

UCS Science Network

UCS

Through our Science Network, UCS collaborates with nearly 20,000 scientists and technical experts across the country, including physicists, ecologists, engineers, public health professionals, economists, and energy analysts. Science Network Voices gives Equation readers access to the depth of expertise and broad perspective on current issues that our Science Network members bring to UCS. The views expressed in Science Network posts are those of the author alone.