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Founder of Simcorp and chairman of the Gaia Trust, Ross Jackson offers a visionary strategy to rework the global economic system and the political institutions that support it. Caroline Lucas MP responds.

Speaking as both an astronomer and "a concerned member of the human race," Sir Martin Rees examines our planet and its future from a cosmic perspective. He urges action to prevent dark consequences from our scientific and technological development.

How can cities help save the future? Alex Steffen shows some cool neighborhood-based green projects that expand our access to things we want and need -- while reducing the time we spend in cars.

Bjarke Ingels wows the audience with his wit and unlikely architectural solutions around the globe. Prepare to be dazzled.

A brief description by Professor Tainter of his collapse theory.

The physicist sees two major trends in the world today: the first is toward a multicultural, scientific, tolerant society; the other, as evidenced by terrorism, is fundamentalist and monocultural. Whichever one wins out will determine the fate of man.

Every day, we use materials from the earth without thinking, for free. But what if we had to pay for their true value: would it make us more careful about what we use and what we waste? Think of Pavan Sukhdev as nature's banker -- assessing the value of the Earth's assets. Eye-opening charts will ma...

Hacker and writer Joshua Klein is fascinated by crows. (Notice the gleam of intelligence in their little black eyes?) After a long amateur study of corvid behavior, he's come up with an elegant machine that may form a new bond between animal and human.

"In a Horizon special, naturalist Sir David Attenborough investigates whether the world is heading for a population crisis.

In his lengthy career, Sir David has watched the human population more than double from 2.5 billion in 1950 to nearly seven billion. He reflects on the profound effects of t...

The United States can eliminate its use of oil by the 2040s, led by business for profit, at an average cost of about US$15 per barrel—half by redoubling the efficiency of using oil ($12/bbl) and half by replacing the rest with saved natural gas and advanced biofuels ($18/bbl). A detailed roadmap pub

Since World War II North Americans have invested much of their newfound wealth in suburbia. It has promised a sense of space, affordability, family life and upward mobility. As the population of suburban sprawl has exploded in the past 50 years, so too has the suburban way of life become embedded in

It seems US corporations are constantly trying to cut corners, find ways around unions and exploit cheap labor. Walmart makes huge profits while keeping its workers in poverty, drives small businesses into bankruptcy, exploits workers in poor countries and is the fiercest anti-union company in the U...

Too much of the world lacks access to clean drinking water. Engineer Michael Pritchard did something about it -- inventing the portable Lifesaver filter, which can make the most revolting water drinkable in seconds. An amazing demo from TEDGlobal 2009.

Part of the Edward P. Bass Distinguished Lecture Series.

Discussion on how the current policy and political process incapable of dealing with environmental crisis

Sustainable Development has become the mantra of the 21st Century. No other concept has had a profound impact on institutional decision-making; forcing governments to change policies and companies to re-think how they do business.

This Episode - Outside Broadcast from Mumbai (Bombay)
The debate ...

At his carpet company, Ray Anderson has increased sales and doubled profits while turning the traditional "take / make / waste" industrial system on its head. In a gentle, understated way, he shares a powerful vision for sustainable commerce.