The Plant a Trillion Trees Podcast

Carlos Alvarez has been a part of the PowerCorpsPHL (Power Corps Philadelphia) team since March 2015 when he started as a crew leader supporting a group of young people completing various environmental sustainability projects in the City of Philadelphia. Since then, he has held many roles mainly focusing on developing the programs technical skills training. He enjoys working with program members o...

Dan Lambe has committed nearly two decades of work to help solve some of the biggest issues facing people and the planet through trees. After being named CEO in 2022 after 19 years in leadership roles at the Arbor Day Foundation, Lambe launched an initiative to accelerate the nonprofit’s impact by planting 500 million trees with a focus on forests and neighborhoods with the greatest need. The ambi...

Matthew Aghai is a climate tech executive with 20 years of professional experience spanning public, private, and academic ventures in reforestation and natural resource management across the globe. He currently serves the teams at Mast Reforestation and its subsidiaries but also enjoys a variety of extracurricular functions including advising and speaking on environmental and sustainability topics...

Jessica Turner-Skoff is Longwood Garden's first Associate Director of Science Communications. She champions Longwood’s leadership in plant science and interprets Longwood’s scientific resources for multiple communication channels and audiences. Jessica is an internationally recognized, award-winning science communicator who is professionally trained as a conservation biologist. She came to Lon...

Annaliese Bischoff is a Western Massachusetts artist and landscape architect. For the past decade, she has been collecting drawings and etchings of trees by Frank A. Waugh, founder of the Landscape Gardening Program at what is today the University of Massachusetts Department of Landscape Architecture and Regional Planning. Annaliese received a bachelor’s degree in art from Brown University and a m...

Marshall Green is a fourth-generation owner and the dedicated nursery manager at Primex Garden Center in Glenside, Pennsylvania. After growing up around Primex, Marshall attended New England Culinary Institute and pursued a career as a chef in Philadelphia. In 2014 Marshall came home to Primex where he settled in as the woody plants buyer and nursery manager. As the woody plants buyer, Marshall is...

Patricia Gallagher is Professor Emerita of Civil, Architectural, and Environmental Engineering at Drexel University. She earned bachelor’s degrees in civil engineering and geological sciences from Rutgers University, a master’s in civil engineering from Ohio State University, and a Ph. D. in civil engineering from Virginia Tech. Her research expertise centers on geotechnical and geoenvironmental e...

Khomchalat Thongting (Kom) is a visionary entrepreneur hailing from a working-class background, who has dedicated 29 years to building a thriving computer and IT consulting business with a team of 45 professionals. With a passion for sustainability and a drive for global impact, Kom has expanded his horizons by delving into the bamboo industry, cultivating 95 acres of bamboo and intercrops while c...

Ben Shardlow is the Board Chair for the Creative Enterprise Zone, a place-based non-profit organization dedicated to attracting and supporting creative people and businesses in Saint Paul, Minnesota. As an urban planner and designer focused on complex public spaces, Ben has worked on developing innovative programs to grow the urban tree canopy in challenging sites for over a decade. In the largely...

Basil Camu loves trees. And soil, wildflowers, insects, bats, fungi - basically everything to do with terrestrial ecosystems. He is fully committed to caring for this beautiful planet. He is a Treecologist, ISA Board Certified Master Arborist, Duke University graduate, and Wizard of Things at Leaf & Limb. Though trees are his passion and profession, he also loves tending to the native flowers...

Sandy and Julia Shettler are a mother-daughter team with Tree Action Seattle, which advocates for Seattle's trees at the neighborhood level and at City Hall.     Sandy is a medical social worker with a background in public health. She focuses on the physical and mental health benefits of living near trees, and the need to bring these benefits to deforested and underserved urban communities. Ju...

Erica Kratofil is Co-Executive Director for The Giving Grove, where she helps lead a national network of urban community orchard and food forest programs. As a social worker, Erica is passionate about community vitality and the many ways that urban orchards benefit both people and the planet.   Erica is a graduate of the University of Notre Dame and has a master’s in social work and nonprofit mana...

Amy Stewart is the New York Times best-selling author of The Drunken Botanist, Wicked Plants, and several other popular nonfiction titles about the natural world. She’s also written several novels in her beloved Kopp Sisters series, based on the story of one of America’s first female deputy sheriffs and her two rambunctious sisters. Her books have sold over a million copies worldwide and have been...

Dr. Glynn Percival is the Senior Arboricultural Researcher at the Bartlett Tree Research and Diagnostic Laboratory. Dr. Percival primarily focuses on how environmental stress (drought, heat, and waterlogging) influences tree growth and susceptibility to pest and disease attacks. He is the author of more than 100 scientific papers, magazine articles, and book chapters, and is an honorary lecturer a...

Cyrus Copeland, a writer and nonprofit pioneer, planted his first tree as a tribute to his father—a red oak on the grounds of Valley Forge. Year after year he returned to the tree. But it wasn’t until Cyrus traveled to the West Bank and witnessed the deep relationship between Palestinians and their olive trees that an idea sparked: Could planting trees bring prosperity and balance to a high-confli...

Dr. Christine Carmichael is the award-winning founder and principal of Fair Forests Consulting, LLC, which she began in July 2019. She is also the best-selling author of Racist Roots: How Racism Has Affected Trees and People in Our Cities—and What We Can Do About It .   She holds a Ph. D. in Forestry with a specialization in Gender, Justice, and Environmental Change and holds a Graduate Certificat...

Marielle Drennan is the owner of Champion Tree, a full-service plant healthcare company based out of King of Prussia, and servicing the Main Line and surrounding areas in Pennsylvania. Marielle is an ISA Certified Arborist® and a Pennsylvania Department of Agriculture Certified Pesticide Technician. Prior to forming Champion Tree, Marielle worked on her husband's pruning crew for several years...

Cliff Drouet is a Forester with the Office of Surface Mining Reclamation and Enforcement (OSMRE) which is a federal agency under the Department of the Interior. Cliff is working with the Appalachian Regional Reforestation Initiative (ARRI). The program restores old surface mine sites throughout Appalachia by planting native seedlings and establishing wildlife habitats. This reforestation program w...

John Perlin is a Professor and Visiting Scholar in the Department of Physics at University of California, Santa Barbara. He is the author of A Forest Journey: The Role of Trees in the Fate of Civilization.   Perlin says, “It is my hope that this edition of A Forest Journey will make clear the imperative humanity faces because losing our forests would not merely be the end of nature, it could mean...

Neelam Patil, M.Ed., MFA, is a Climate Literacy and Science Teacher in the Berkeley public school system.  She was awarded TIME Innovative Teacher of the Year 2022 by TIME Magazine based on her work teaching children they can do something about climate change. Ms. Patil spearheaded the planting of the first Miyawaki schoolyard forests in North America in Berkeley, California.  While teaching her s...

Robert Lundgren has a Bachelor of Plant Science and Fine Arts minor from the University of Delaware, and a Master of Landscape Architecture from the University of Pennsylvania. He worked at landscape architecture firms, Olin and Andropogon and is now at Penn working as the University Landscape Architect within the Facilities & Real Estate Services Division, shepherding a variety of landscape p...

Dave Muffly has been planting trees (especially oaks) in the Bay Area and other California locations for more than 30 years. Dave began his tree career when he received his undergraduate degree in mechanical engineering, at Stanford University. Moving from engineering to ecology, Dave managed native oak plantings at Stanford with the non-profit Magic, in a project that has yielded more than 4,000...

Daniel Hinkley is a plantsman, author, lecturer, nurseryman, and horticultural consultant.  He earned a B.S. in Horticulture and Horticulture Education from Michigan State University and an M.S. in Urban Horticulture at the University of Washington.  His first garden, Heronswood, near Kingston, Washington is now owned and operated by the Port Gamble SKlallam Tribe and is open to the public through...

Mr. Al Key has been involved in the green industry for 30 years as an owner of DeepRoot Green Infrastructure, LLC. Together with his partners, he co-invented the SilvaCell® and has received several patents for his inventions which address trees and stormwater management in the urban setting. He has written for a wide range of publications, including the Journal of Arboriculture and Civil Engineeri...

Doug Oster is Pittsburgh’s GardenGuru and is host of the popular radio show The Organic Gardener on KDKA radio every Sunday morning. He writes a gardening column for The Green Voice, the newsletter for Pittsburgh Earth Day. Oster appears on KDKA-TV’s Pittsburgh Today Live as a contributor. He’s also the host of the Talking Trees podcast for the Davey Tree Expert Company along with starring and pro...