Jungus

Co-creator of the philanthropic FEED bags, Ellen Gustafson says hunger and obesity are two sides of the same coin. At TEDxEast, she launches The 30 Project — a way to change how we farm and eat in the next 30 years, and solve the global food inequalities behind both epidemics.

Nalini Nadkarni challenges our perspective on trees and prisons — she says both can be more dynamic than we think. Through a partnership with the state of Washington, she brings science classes and conservation programs to inmates, with unexpected results.

The world’s population will grow to 9 billion over the next 50 years — and only by raising the living standards of the poorest can we check population growth. This is the paradoxical answer that Hans Rosling unveils at TED@Cannes using colorful new data display technology (you’ll see).

The Gulf oil spill dwarfs comprehension, but we know this much: it’s bad. Carl Safina scrapes out the facts in this blood-boiling cross-examination, arguing that the consequences will stretch far beyond the Gulf — and many so-called solutions are making the situation worse.

Clay Shirky looks at “cognitive surplus” — the shared, online work we do with our spare brain cycles. While we’re busy editing Wikipedia, posting to Ushahidi (and yes, making LOLcats), we’re building a better, more cooperative world.