It contains lots of organic matter, old leaves and roots from plants that grew thousands of years ago. That leaves the shore here more exposed to erosion from storms, which are also getting more powerful, another effect of climate change. It’s a pretty tight case. Once there was a world that was not too hot and not too cold. And with twice as many, we’re still talking about only six molecules out of ten thousand. On Venus, it’s almost all in the form of gas– carbon dioxide– in the atmosphere. But that’s not even two percent of the 30 billion tons of CO2 that our civilization is cranking out every year. It’s now clear beyond any reasonable doubt that we are changing the climate.

This content was created by a Daily Kos Community member. We all glow with invisible heat radiation, even in the dark. And now, our carelessness and greed put all of that at risk. Because the Arctic regions are warming faster than anywhere else on Earth, the permafrost is thawing and its contents are rotting, just like when you unplug the freezer. I represent that long-term trend, which is climate. And, funny thing, the measured increase in CO2 in the atmosphere tallies with the known amount we’re dumping there by burning coal, oil and gas.

With no CO2 on our planet, Earth would be a big snowball.

Cosmos: A Spacetime Odyssey (2014) s01e12 Episode Script

About 10, years ago, our ancestors all over the world took advantage of another form of climate change, the gentler climate of the spacehime in the ice age– they invented agriculture. That’s exactly what we expect from greenhouse warming, but the opposite of what increased solar output would cause.

How can wirksheet be so sure? Frank Shuman’s dream of a solar-powered civilization would have to wait another century before it was reborn. Whatever the reason we first mustered the enormous resources required for the Apollo program, however mired it was in Cold War nationalism and the instruments of death, the inescapable recognition of the unity and fragility of the Earth is its clear and luminous epislde, the unexpected gift of Apollo.


And they may well ask, why climb the highest mountain? Even though it is million kilometers away from us, feel its awesome power!

The British and German governments both coxmos Shuman generous funding to develop his invention. Weather is chaotic, which means that even a microscopic disturbance can lead to large-scale changes.

InCarl Sagan’s PhD thesis included the first calculation of the runaway greenhouse effect on Venus. Once there was a world If life ever existed on Venus, it would have had no chance to avert the hellish destiny of this world.

Cosmos Episode 12 — Ancient Greenhouse Worlds

Articles with short description Television episode articles with short description with no season number Television episode articles with short description and disambiguated page names Interlanguage link template link number Official website not in Wikidata. But the Southern Hemisphere is mostly ocean. We looked homeward and discovered another world– our own.

It was only because our ancestors learned to think long-term, and act accordingly, that we’re here at all. The world is cosmod than it was in the 19th century.

Well, it’s been calculated, a few degrees rise in the Earth’s temperature would melt the polar ice caps. And it’s not as if we didn’t see it coming. We can’t observe climate directly– all we see is the weather– but the average weather, over the course of years, reveals a pattern.

Cosmos: A Spacetime Odyssey () s01e12 Episode Script | SS

This episode explores the nature of the greenhouse effect and the evidence demonstrating the existence of global warming from humanity’s influence. Most of the carbon on Earth has been stored for eons in solid vaults of carbonate rock, like this one, part of a chain that eppisode the celebrated White Cliffs of Dover, right on the English Channel.

The Earth, in stunning contrast, is alive. For the first time, we inhabitants of Earth could step back and see it as it really is– one world, indivisible, and kind of small in the cosmic context. And now, our carelessness and greed put all of that at risk.


Things would get uncomfortably hot and cause us some serious problems but never as hot as Venus; not even close. There are no scientific or technological obstacles to protecting our world and the precious life that it supports. An episode of Cosmos: It all depends on what we truly value and if we can summon the will to act.

Our fingerprints are all over this one. Okay, so odyssry losing the summer sea ice in a place where hardly anyone ever goes.

Even now, man may be unwittingly changing the world’s climate through the waste products of his civilization. Edison’s first public demonstration of the lightbulb will not take place for another year. This page was last edited on 3 Februaryat This is what the Earth looks like in the infrared. Each big eruption sends millions of tons of CO2 into the atmosphere.

So far, it was still just theoretical. Climate is the long-term odyxsey of the weather, over a number of years. The Sun isn’t the problem. Maybe the Earth itself is causing the rise in CO2. For all us scientists know, we could be in for global cooling. Tyson points out that in both cases, the economics and ease of using cheap coal and oil caused these inventions to be overlooked at the time.

We stand on the shoulders of those who did the hard work that such a fundamental transformation required. He’s a math teacher named Augustin Oodyssey. The magnificent head of the Statue of Liberty has just been completed. There’s no such thing as electrical appliances.