Global Dimming

Category: Environment

We are all seeing rather less of the Sun. Scientists looking at five decades of sunlight measurements have reached the disturbing conclusion that the amount of solar energy reaching the Earth's surface has been gradually falling. Paradoxically, the decline in sunlight may mean that global warming is a far greater threat to society than previously thought.

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NASA satellites have mapped Earth's gravity and discovered mysterious spots where gravity is weaker; how earthquakes change the planet's gravitational field.

2013 • Secrets of the EarthEnvironment

Search for the Super Battery

We live in an age when technological innovation seems to be limitlessly soaring. But for all the satisfying speed with which our gadgets have improved, many of them share a frustrating weakness: the batteries. Though they have improved in last century, batteries remain finicky, bulky, expensive, toxic, and maddeningly short-lived. The quest is on for a “super battery,” and the stakes in this hunt are much higher than the phone in your pocket. With climate change looming, electric cars and renewable energy sources like wind and solar power could hold keys to a greener future...if we can engineer the perfect battery. Join host David Pogue as he explores the hidden world of energy storage, from the power—and danger—of the lithium-ion batteries we use today, to the bold innovations that could one day charge our world.

2017 • NOVA PBSEnvironment

Planet Ocean

Can we imagine a film that would change the way people look at the ocean? Can we explain simply, to everyone, the greatest natural mystery of our planet? And lastly, can we help our children believe in a better and more sustainable world tomorrow? This is the triple challenge of a new cinema adventure signed by Yann Arthus-Bertrand and editor- in-chief Michael Pitiot, who brings with him the scientific missions of TARA, a unique pool of researchers, oceanographers and biologists from several countries. Thanks to its astonishing photography, the film takes us on a magnificent and unprecedented journey into the heart of the least known regions of our planet. For more info visit

2012 • Environment


A look at how every one of the 20,000 islands was colonised by the Polynesians.

South PacificEnvironment

Can We Save the Reef?

Off Australia's northeast coast lies a wonder of the world, a living structure so big it can be seen from space, more intricate and complex than any city, and so diverse it hosts a third of all fish species in Australia. The Great Barrier Reef as we know it -- 8,000 years old and home to thousands of marine species -- is dying in our lifetime.

2017 • Catalyst: Series 18Environment

Why do buildings fall in earthquakes?

Earthquakes have always been a terrifying phenomenon, and they’ve become more deadly as our cities have grown — with collapsing buildings posing one of the largest risks. But why do buildings collapse in an earthquake? And how can it be prevented? Vicki V. May explains the physics of why it is not the sturdiest buildings, but the smartest, that will remain standing.