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

Visionary clean energy entrepreneur Danny Kennedy explores the promise and challenges of the epic civilizational transition to renewable energy. Without doubt, the shift has hit the fan, but will

Visionary clean energy entrepreneur Danny Kennedy explores the promise and challenges of the epic civilizational transition to renewable energy. Without doubt, the shift has hit the fan, but will we make the transition in time to avert complete climate breakdown? Danny Kennedy says we can – and the real heroes will be millions of clean energy entrepreneurs and startups, in partnership with the determined leadership of Indigenous Peoples arising worldwide.




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Danny Kennedy, with a long background in eco activism, has become one of the nation’s leading figures in clean-technology entrepreneurship and the capitalization of the transition to a “green” economy. Kennedy is currently CEO of New Energy Nexus (https://www.newenergynexus.com/) , a global nonprofit providing funds, accelerators, and networks to drive clean energy innovation and adoption.