By 2050, Earth's population is projected to reach 10 billion. This presents a critical challenge: how can we provide basic needs for everyone while simultaneously avoiding the worst impacts of

By 2050, Earth's population is projected to reach 10 billion. This presents a critical challenge: how can we provide basic needs for everyone while simultaneously avoiding the worst impacts of climate change?

In a compelling talk, science journalist Charles C. Mann explores proposed solutions. He divides them into two camps—"wizards" and "prophets"—and offers his own insights on the best path for survival. (November 2018)

The Center for Biological Diversity is a 501(c)(3) nonprofit organization of lawyers, scientists, and activists based in Tucson, Arizona. They are dedicated to protecting endangered species and

The Center for Biological Diversity is a 501(c)(3) nonprofit organization of lawyers, scientists, and activists based in Tucson, Arizona. They are dedicated to protecting endangered species and their habitats across the planet.

Believing human welfare is deeply linked to nature—to the vast diversity of wild animals and plants—the Center uses science, law, and creative media to secure a future for all species. Their work focuses on safeguarding the lands, waters, and climate essential for survival, ensuring a wild world for generations to come. Learn more about their mission: biologicaldiversity.org

Alejandro Aravena's architectural philosophy is to "bring the community into the process." Ten years ago, when tasked with building housing for 100 families in Chile, he found inspiration in

Alejandro Aravena's architectural philosophy is to "bring the community into the process." Ten years ago, when tasked with building housing for 100 families in Chile, he found inspiration in favelas. Instead of small units in large buildings, he designed flexible "half-homes" that each family could expand. This complex problem found a simple solution through direct collaboration with the families themselves.

Aravena showcases three projects where clever rethinking led to beautiful, beneficial design. Learn more at Alejandro Aravena's website, or follow TED on Twitter and Facebook.

Melinda Gates champions contraception as a critical international health issue. The Bill & Melinda Gates Foundation is dedicated to ensuring everyone has the opportunity to lead healthy,

Melinda Gates champions contraception as a critical international health issue. The Bill & Melinda Gates Foundation is dedicated to ensuring everyone has the opportunity to lead healthy, productive lives.

This page features videos, including content from the TEDx program, highlighting the Foundation's work in global health, global development, and U.S. education.

For more, visit the Foundation's YouTube channel for Global Health Stories.

Millionaire Doug Tompkins, founder of Esprit, purchased a vast rainforest in Southern Chile to create Pumalin Park, a significant biodiversity reserve. However, his philanthropy faces suspicion

Millionaire Doug Tompkins, founder of Esprit, purchased a vast rainforest in Southern Chile to create Pumalin Park, a significant biodiversity reserve. However, his philanthropy faces suspicion from many Chileans.

Critics, including conservative politician Jaime Orpis, view Tompkins' 100km reserve as a national security threat, linking the Argentine border to central Chile. His anti-development stance also irritates a nation seeking economic growth. Despite calls for him to leave, Tompkins remains committed to protecting the park until the Chilean government assumes its preservation.

This report was produced by ABC Australia and distributed by Journeyman Pictures.

Andrew Revkin's New York Times blog, Dot Earth (launched 2007), explores global sustainability.

This initiative is vital as the world faces

Andrew Revkin's New York Times blog, Dot Earth (launched 2007), explores global sustainability.

This initiative is vital as the world faces an impending population of nine billion and a growing consensus on the significant dangers posed by climate change.