Join world-renowned researcher Dr. Alberto Burquez for a free presentation on giant columnar cacti, including Arizona's iconic saguaros. Dr. Burquez will detail his research on their evolutionary

Join world-renowned researcher Dr. Alberto Burquez for a free presentation on giant columnar cacti, including Arizona's iconic saguaros. Dr. Burquez will detail his research on their evolutionary history, ecology, adaptations to the Sonoran Desert, and the effects of climate change.

A researcher at the Universidad Nacional Autónoma de México (UNAM), Dr. Burquez is a co-author of "The Saguaro Cactus: A Natural History" and an expert in columnar cacti population ecology and genetics. His work also covers plant-animal relationships and land-use change in the Sonoran Desert.

For more information, visit the Natural History Institute's website, explore events, or connect via Instagram and Facebook. You can also donate.

Motivated by the disparity between advanced deforestation technology and stagnant tree planting methods, Bryce Jones founded Flash Forest. As Canada's first drone reforestation company, Flash

Motivated by the disparity between advanced deforestation technology and stagnant tree planting methods, Bryce Jones founded Flash Forest. As Canada's first drone reforestation company, Flash Forest aims to create a practical, scalable solution to accelerate global reforestation and address the climate crisis.

Flash Forest's mission is to maximize carbon sequestration and restore ecosystems worldwide. CEO Bryce Jones envisions planting one billion trees by 2028, with continued efforts beyond this ambitious goal.

Bryce leads Flash Forest from Toronto, Ontario. This talk was given at a TEDx event. Learn more at https://www.ted.com/tedx.

In the 1970s and 80s, the Ecology Action Center (then Operation Recycle) used recycling profits to plant trees at Comlara Park on Evergreen Lake. These trees now form the beautiful woods

In the 1970s and 80s, the Ecology Action Center (then Operation Recycle) used recycling profits to plant trees at Comlara Park on Evergreen Lake. These trees now form the beautiful woods surrounding the lake, enriching our lives year-round. Learn more about tree planting efforts: https://ecologyactioncenter.org/climate/tree-corps/

Myra Gordon, Executive Director of the Illinois Prairie Community Foundation, had a diverse career. She served as a Girl Scout Professional, Executive Director for Operation Recycle, and worked at State Farm before leading the Illinois Prairie Community Foundation. She also volunteers for organizations like the Ecology Action Center.

This talk was presented at a locally organized TEDx event. Learn more: https://www.ted.com/tedx

In an era of extreme social, political, and religious polarization, healthy communities are vital. Utilizing community empowerment and development principles through agriculture can foster

In an era of extreme social, political, and religious polarization, healthy communities are vital. Utilizing community empowerment and development principles through agriculture can foster sustainability.

Buddy Walker, called to international missions at 16, developed extensive experience in disaster relief, mission coordination, and sustainable community development partnerships. His agricultural expertise, including soil science and micro-intensive farming, culminated in the 2012 establishment of the Empower School & Farm in Umatilla, Florida.

This residential program trains individuals in Christian discipleship, micro-enterprise, sustainable agriculture, and world missions. This talk was presented at a TEDx event. Learn more at https://www.ted.com/tedx.

Former U.S. Energy Secretary Dr. Steven Chu, who oversaw a doubling of renewable energy

Former U.S. Energy Secretary Dr. Steven Chu, who oversaw a doubling of renewable energy deployment from 2009-2013, addresses if falling fossil fuel prices threaten wind and solar power.

Chu explains that 78% of U.S. economies have state-mandated renewable portfolio standards, requiring a fraction of clean energy. Renewables, currently supplying 13% of U.S. electricity, have seen significant cost reductions. Wind power, even without subsidies, is nearly as inexpensive as natural gas.

Solar generation in sunny regions nears cost parity with new natural gas plants. Wind and solar costs are projected to decline for decades, potentially making them competitive with any new energy source across much of the U.S. within a decade.

Join host Jeff Corwin on "Wildlife Nation" as he explores North America's remarkable reptiles. He visits Florida to see how a nuclear power plant aids American crocodile habitat and uncovers the

Join host Jeff Corwin on "Wildlife Nation" as he explores North America's remarkable reptiles. He visits Florida to see how a nuclear power plant aids American crocodile habitat and uncovers the Eastern indigo snake, the continent's largest non-venomous species. Later, Jeff helps save a beloved turtle in Massachusetts.

Teaming up with Defenders of Wildlife, Corwin celebrates these incredible creatures and the dedicated conservationists protecting them. You're invited to join this adventure.

Ecological restoration is challenging, with many advanced technologies being costly and complex. However, effective, low-tech "old school" methods have been successfully employed by land managers

Ecological restoration is challenging, with many advanced technologies being costly and complex. However, effective, low-tech "old school" methods have been successfully employed by land managers for decades.

Dr. Elise Gornish, a UA restoration ecologist, will share these accessible techniques, from seed balls to rock lunas, for restoring disturbed ecosystems. Her work focuses on arid land restoration and integrating approaches into weed management. She also directs UA GALS, a program offering STEM leadership to underserved female high school students.

For more talks and events, subscribe to the Natural History Institute's YouTube channel or visit their website: naturalhistoryinstitute.org/events.

Rafael Gallo's presentation, "Environmental Sustainability and Saving Resources," was filmed by Barry Heidt of sustainabletv (editing by Tom Hopkins of

Rafael Gallo's presentation, "Environmental Sustainability and Saving Resources," was filmed by Barry Heidt of sustainabletv (editing by Tom Hopkins of Sustainable Today) at TIES' 2010 ESTC event in Portland, Oregon.

A passionate whitewater paddler, Gallo founded a leading rafting company in Costa Rica. He has introduced thousands to the sport, successfully fought to save the Pacuare River from dam threats, and protects 2000 acres of rainforest. His eco-lodge has also planted nearly 14,000 native trees as part of the UN's "Plant for the Planet" campaign. For more on community development, visit Eltigredepacuare.com.

Notpla, an Earthshot Prize-winning startup co-founded by Pierre Paslier, creates innovative packaging from seaweed and plants. Their solutions, including edible bubbles and biodegradable

Notpla, an Earthshot Prize-winning startup co-founded by Pierre Paslier, creates innovative packaging from seaweed and plants. Their solutions, including edible bubbles and biodegradable containers, offer sustainable alternatives to single-use plastics, composting to nourish new growth. Watch their CEShow episode to learn more: Notpla CEShow.

The Ellen MacArthur Foundation, a UK charity, champions the circular economy. This design-driven approach eliminates waste and pollution, circulates products, and regenerates nature. Explore their work and subscribe for insights: YouTube | Website | Instagram | Facebook | Twitter | LinkedIn.

New research highlights how decades of U.S. housing policy have created urban environments where prosperous, white neighborhoods enjoy ample tree shade, while low-income communities of color lack

New research highlights how decades of U.S. housing policy have created urban environments where prosperous, white neighborhoods enjoy ample tree shade, while low-income communities of color lack green spaces. National Geographic writer Alejandra Borunda explores how activists are working to make Los Angeles greener and healthier for everyone, emphasizing that solutions extend beyond simply planting more trees.

Discover more in the "Cooling Cities By Throwing Shade" episode of the Overheard at National Geographic podcast. Listen on Apple Podcasts, Spotify, Stitcher, Google Podcasts, iHeart Radio, or Castbox. Subscribe to National Geographic: http://bit.ly/NatGeoSubscribe. Photography by Elliot Ross, Nat Geo Image Collection.