Who we are

Erik Blachford

Erik Blachford Currently the Chief Executive Officer of Terrapass, Erik Blachford was formerly President and CEO of Expedia, Inc. and CEO of IAC/InterActiveCorp's travel division, IAC Travel, including online travel businesses Expedia, Hotels.com, Hotwire, Classic Custom Vacations and Interval International. Previous positions include President, Expedia North America and Expedia Senior Vice President, Marketing & Programming.

Erik serves as a board director at TerraPass, Sharebuilder (Bellevue, WA), Zillow. (Seattle, WA), Farecast (Seattle, WA) and Surfparks (New York, NY). Erik holds a bachelor's degree in English and certificate in theater from Princeton University and a Masters in Business Administration from Columbia University's Graduate School of Business.




Tom Arnold

Tom Arnold Tom Arnold is TerraPass' founder and currently serves as its Chief Environmental Officer. As a leading expert in carbon offset standards and project analysis, Tom is a frequent speaker at industry conferences and a regular resource for the national media. Since starting TerraPass in 2004, he has earned a reputation as a pioneer in the voluntary carbon market. Tom helped to conceive and executed the first agricultural methane transaction on the Chicago Climate Exchange; under his leadership TerraPass became the first offset seller to undergo a complete entity level audit and to integrate wind energy into its portfolio. Tom is a graduate of Dartmouth College and received an MBA with honors from the University of Pennsylvania's Wharton School.








Technical Advisory Board

We have assembled a world-class Technical Advisory Board to advise us on the latest in climate science. Both Bill Moomaw and Bill Schlesinger bring a wealth of science expertise to our company. Additionally, the board periodically reviews our carbon reduction strategy and choice of projects.

Bill Moomaw

William Moomaw

William Moomaw is Professor of International Environmental Policy at Tufts University, and Director of the Center for International Environment and Resource Policy. His teaching and research focus on issues such as quantitative indicators of environment and development; sustainable development; trade and environment; technology and policy implications for climate change; water and climate change; biodiversity; and negotiation strategies for environmental agreements.

In addition to his roles at Tufts, Bill is Senior Co-Director, Global Development and Environment Institute; Co-Director, Public Disputes Program, Program on Negotiations; Convening Lead Author, Intergovernmental Panel on Climate Change 2001; Board of Directors, Consensus Building Institute; Science Advisory Committee, Earthwatch; and Lead author, Intergovernmental Panel on Climate Change 2003.

Bill earned his BA from Williams College and PhD in physical chemistry from the Massachusetts Institute of Technology.


Bill Schlesinger

Bill Schlesinger

William Schlesinger, Ph.D., is President of the Cary Institute of Ecosystem Studies in Millbrook, NY, and former Dean of the Nicholas School of the Environment and Earth Sciences at Duke University.

After completing his BA at Dartmouth and PhD at Cornell, he joined the Duke faculty in 1980. He is the author or coauthor of over 160 scientific papers and the widely-adopted textbook Biogeochemistry: An analysis of global change (Academic Press, 2nd ed. 1997). He was elected a member of the American Academy of Arts and Sciences in 1995 and the National Academy of Sciences in 2003. He was President of the Ecological Society of America for 2003-2004.

Currently, Schlesinger focuses his research on global change ecology. He is the co-principal investigator for the Free Air Carbon Dioxide Enrichment (FACE) Experiment in the Duke Forest, a project that seeks to explain how an entire forest ecosystem (vegetation and soils) will respond to elevated carbon dioxide. He has also extensively studied desert ecosystems and their response to global climate change. From 1991 to 2000, he served as Principal Investigator for the NSF-sponsored program of Long Term Ecological Research (LTER) at the Jornada Basin in southern New Mexico.

His past work has taken him to diverse habitats, ranging from Okefenokee Swamp in southern Georgia to the Mojave Desert of California. His research has been featured on NOVA, CNN, NPR, and on the pages of Discover, National Geographic, The New York Times, and Scientific American.

Schlesinger has testified before U.S. House and Senate Committees on a variety of environmental issues, including preservation of desert habitats and global climate change.


Michael Northrop

Michael Northrop

Michael F. Northrop is Sustainable Development Program Director of the Rockefeller Brothers Fund in New York. He focuses on climate change, forest protection and marine conservation. Previous positions have included a stint as Executive Director of Ashoka, an international development organization that seeks and supports public service entrepreneurs working around the globe; at First Boston (investment bank) in New York; and as a teacher at Anatolia College in Greece and at Gadjah Mada University in Indonesia.

Currently, he serves on the Advisory Boards of Climate Change Capital in London, and The Climate Group also based in London, and on the board of directors of Oceana, a global marine conservation organization; SmartPower, which aims to increase demand for clean energy; and Princeton in Asia, which grants postgraduate fellowships for Americans to work in Asia. Northrop holds a master's degree in public policy with a specialization in international affairs from the Woodrow Wilson School at Princeton University, where he was an English major as an undergraduate.