David Keith reviews the science and technology of solar geoengineering, addressing the following Q’s: how effective could it be in reducing climate risks? What new risks does it entail? What

David Keith reviews the science and technology of solar geoengineering, addressing the following Q’s: how effective could it be in reducing climate risks? What new risks does it entail? What is uncertain? And, finally, how could uncertainty be reduced to a substantial research program? He presents a case for integrating solar geoengineering into a 4D climate policy that includes emissions cuts, carbon removal, and adaptation.

David Keith has worked near the interface between climate science, energy technology, and public policy since ’91. He took first prize in Canada’s national physics prize exam, won MIT’s prize for excellence in experimental physics, and was one of TIME Magazine’s Heroes of the Environment. David is Professor of Applied Physics at the Harvard School of Engineering and Applied Sciences and Professor of Public Policy at the Harvard Kennedy School, and founder of Carbon Engineering, a Canadian company developing technology to capture CO 2 from ambient air to make carbon-neutral hydrocarbon fuels. Best known for his work on the science, technology, and public policy of solar geoengineering, David led the development of Harvard’s Solar Geoengineering Research Program, a Harvard-wide interfaculty research initiative. His work has ranged from the climatic impacts of large-scale wind power to an early critique of the prospects for hydrogen fuel. David’s hardware engineering work includes the first interferometer for atoms, a high-accuracy infrared spectrometer for NASA’s ER-2, the development of Carbon Engineering’s air contactor and overall process design, and the development of a stratospheric propelled balloon experiment for solar geoengineering. He teaches science and technology policy, climate science, and solar geoengineering. David is the author of over 200 academic publications with a total citation count of over 13,000. He has written for the public in op-eds and A Case for Climate Engineering.

Moderated by Greg Bronevetsky.

#geoengineering #climatescience #solarengineering

urok and Karuk peoples have been fighting for decades to remove dams on the Klamath River that destroyed riparian ecosystems and decimated salmon populations that underscore traditional lifeways.

urok and Karuk peoples have been fighting for decades to remove dams on the Klamath River that destroyed riparian ecosystems and decimated salmon populations that underscore traditional lifeways. In 2022, the US government finally agreed to remove four dams and engage in the largest river restoration project in US history. Join us to learn the story of this incredible achievement in tribal activism, groundbreaking tribal partnerships with state and federal governments, and culture-based methods for river restoration. Moderated by Cara Romero. With: Samuel Gensaw, Isaac Kinney and Craig Tucker.

This talk was delivered at the 2023 Bioneers Conference.

Learn more at http://www.bioneers.org

David Korten, author of "Agenda for a New Economy," presented at the 39th Trinity Institute National Theological Conference. His address explored "Radical Abundance: A Theology of

David Korten, author of "Agenda for a New Economy," presented at the 39th Trinity Institute National Theological Conference. His address explored "Radical Abundance: A Theology of Sustainability."

Learn more about David Korten at davidkorten.org. His book, "Agenda for a New Economy," can be ordered from Amazon.com.

EARTH DAY 2020 - A Message from Elder Nii Gaani Aki (Leading Earth Man) - Dr. David Courchene of Turtle Lodge, Canada

Mother Earth is giving birth to a new

EARTH DAY 2020 - A Message from Elder Nii Gaani Aki (Leading Earth Man) - Dr. David Courchene of Turtle Lodge, Canada

Mother Earth is giving birth to a new life. 

David W. Orr is the Paul Sears Distinguished Professor of Environmental Studies and Politics and Special Assistant to the President at Oberlin College. He also holds a James Marsh Professorship at

David W. Orr is the Paul Sears Distinguished Professor of Environmental Studies and Politics and Special Assistant to the President at Oberlin College. He also holds a James Marsh Professorship at the University of Vermont.

Orr is the author of *The Nature of Design* (Oxford, 2002) and *Design on the Edge* (MIT, 2006).

His recent work includes a two-year, $2 million project to define a 100-day climate action plan for the Obama administration. Learn more at www.climateactionproject.com.

David Suzuki shared the following remarks at the Honouring Ceremony, while hundreds gathered on Saturday November 6, 2021 at the Turtle Lodge International Centre for Indigenous Education and

David Suzuki shared the following remarks at the Honouring Ceremony, while hundreds gathered on Saturday November 6, 2021 at the Turtle Lodge International Centre for Indigenous Education and Wellness to honour Elder Dr Dave Courchene and his Vision of Turtle Lodge.