Dr. David Grinspoon is the author of Earth in Human Hands: Shaping Our Planet’s Future. He is also part of the team working with NASA on a proposed mission to Venus! On this bonus episode of Reversing Climate Change, David is back on the show with Ross to discuss the basic units of the geological time scale and explain why he proposes calling this new time marked by human impact and self-awareness the Sapiezoic Eon rather than the Anthropocene Epoch.

Julia Pyper and Shane Skelton are two of the three cohosts of Political Climate, a bipartisan podcast on energy and environmental politics in America. Today, Julia and Shane join Ross to discuss how their show is working to normalize the conversation on climate change (on both sides of the aisle) and explore what’s behind the increasing polarization in DC and what role the media plays in perpetuating our political divisions.

Sanchali Pal is the Founder and CEO of Joro, an app designed to mobilize climate action. On this bonus episode of Reversing Climate Change, Sanchali joins Ross and Alexsandra to explain how Joro allows users to track their carbon footprint (by way of credit card data) and take collective action to reduce emissions through behavior change, and how Nori and Joro are working together.

J. Maarten Troost is the travel writer behind such titles as The Sex Lives of Cannibals, Getting Stoned with Savages and Headhunters on My Doorstep. He spent multiple years in Kiribati in the Equatorial Pacific as well as Fiji and Vanuatu. On this episode of the Reversing Climate Change, Maarten joins Ross to explain how he came to spend time in the region of Oceania and offer insight around the provocative titles for his books and the egalitarian nature of island culture.

Ethan Soloviev is the coauthor of Regenerative Enterprise and Levels of Regenerative Agriculture and co-owner of High Falls Farm,  a multi-enterprise farm in the Hudson Valley of New York that aims toward regenerative principles and practices. On this bonus episode, Ethan joins Ross to introduce us to the Jewish idea of shmita, as well as his attempts to learn from Irish/Celtic and indigenous North American agricultural traditions as well.

Dr. Lauren Gifford is a critical geographer exploring the intersections of global climate policy, conservation, markets, and justice. She is also the host of Carbon Social Club and the author of a recent paper entitled “‘You Can’t Value What You Can’t Measure’: A Critical Look at Forest Carbon Accounting.” On this episode, we dig into avoided deforestation credits, REDD/REDD+, and the dynamics at play when carbon is commoditized in forestry and in general.

Dr. Greg Dipple is a Professor of Geology in the Department of Earth, Ocean and Atmospheric Sciences at the University of British Columbia—Vancouver,and a podcast alumnus! On this bonus episode of Reversing Climate Change, Greg joins Ross to give us an update on his research around carbon mineralization in mine tailings, reminding us how the process works and explaining why it’s not already common practice.

Dr. Jane Zelikova is the Chief Scientist at Carbon180, a carbon removal think tank on a mission to fundamentally rethink carbon, and cofounder of 500 Women Scientists, a nonprofit dedicated to transforming the leadership, diversity, and public engagement in science.  On this episode of the Reversing Climate Change, Jane joins Ross and Christophe to discuss the challenges of measuring the carbon content of soil and the projections around how much CO2 we can sequester with improved management practices.

Maria Streshinsky is the Executive Editor of Wired, a science and technology magazine devoted to exploring technology’s potential to shape the world for the better. On this bonus episode of Reversing Climate Change, Maria joins Ross to discuss the forthcoming issue of Wired, walking us through its sections on carbon capture, food and land, transportation and renewable energy.

Dr. Roger Aines is the Chief Scientist of the Energy Program at Lawrence Livermore National Laboratory and coauthor of the LLNL report Getting to Neutral: Options for Negative Carbon Emissions in California. On this episode of the Reversing Climate Change, Roger joins Ross and Christophe to discuss how the California study came about and walk us through the three carbon removal strategies outlined in the report—natural solutions, waste biomass and direct air capture.