TED Talks Daily TED Audio Collective

Clearing tropical forests isn't just dangerous to the natural world — it's also a threat to human health and wellbeing, says physician Neil Vora. Tracing how environmental devastation led to deadly epidemics like Ebola, he presents three ways deforestation unleashes disease and calls on each of us to help preserve the delicate ecological balance we depend upon.

South Africa transitioned to democracy in the 1990s with a visionary constitution, but the promises of that constitution are largely unfulfilled to this day. Public leader Lindiwe Mazibuko explores how poor leadership failed to deliver a better life for the country's citizens — and shares her mission to cultivate a new generation of ethical leaders who can revitalize democracy in South Africa and beyond.

Tackling climate change costs a lot of money — and the financial sector is key to getting that money flowing. In a wide-ranging conversation, sustainable investment leaders Nili Gilbert and David Blood discuss where progress is being made on climate solutions, where capital still needs to move faster and why this is an unprecedented opportunity for sustainable growth.

Your immune system is more socially aware than you think, says social neuroscientist and psychology professor Keely Muscatell. Investigating the interconnectedness of your mood and your inflammatory system, she offers an evolutionary reason as to why being sick may make you feel depressed — and vice versa.

We can produce abundant, sustainable and cheap energy — for everyone, says physicist Julio Friedmann. He explores the infrastructure, innovation and investment needed to supply energy to 10 billion people, offering case studies from Chile's refurbished supply chain, built in partnership with Japan, to Namibia's budding clean hydrogen production, inviting us to envision a greener, more equitably powered world.

Photosynthesis is one of the most important processes on the planet, helping produce the food we eat and the air we breathe. Crop scientist Steve Long thinks it could be more efficient — and he's intent on giving it a boost. He shows how hacking photosynthesis could help feed the world all while reducing climate change.