Loading...

What They Haven't Told You about Climate Change

2,476,666 views

Loading...

Loading...

Transcript

The interactive transcript could not be loaded.

Loading...

Loading...

Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Jul 27, 2015

Since time immemorial, our climate has been and will always be changing. Patrick Moore explains why “climate change,” far from being a recent human-caused disaster, is, for a myriad of complex reasons, a fact of life on Planet Earth.
Donate today to PragerU! http://l.prageru.com/2ylo1Yt

Joining PragerU is free! Sign up now to get all our videos as soon as they're released. http://prageru.com/signup

Download Pragerpedia on your iPhone or Android! Thousands of sources and facts at your fingertips.

iPhone: http://l.prageru.com/2dlsnbG
Android: http://l.prageru.com/2dlsS5e

Join Prager United to get new swag every quarter, exclusive early access to our videos, and an annual TownHall phone call with Dennis Prager! http://l.prageru.com/2c9n6ys

Join PragerU's text list to have these videos, free merchandise giveaways and breaking announcements sent directly to your phone! https://optin.mobiniti.com/prageru

Do you shop on Amazon? Click https://smile.amazon.com and a percentage of every Amazon purchase will be donated to PragerU. Same great products. Same low price. Shopping made meaningful.

VISIT PragerU! https://www.prageru.com

FOLLOW us!
Facebook: https://www.facebook.com/prageru
Twitter: https://twitter.com/prageru
Instagram: https://instagram.com/prageru/
PragerU is on Snapchat!

JOIN PragerFORCE!

For Students: http://l.prageru.com/29SgPaX
JOIN our Educators Network! http://l.prageru.com/2c8vsff

Script:

The only constant... is change.

That's true about life. And it's true about the climate. The climate has been constantly changing since the earth was formed 4.6 billion years ago.

For example, in just the past 2000 years, we have seen the Roman Warm Period, when it was warmer than today...Then came the cooler Dark Ages... Followed by the Medieval Warm period, when it was at least as warm as today... Then we had the Little Ice Age -- that drove the Vikings out of Greenland. And, most recently, a gradual 300-year warming to the present day. That's a lot of changes. And, of course, not one of them was caused by humans.

During the past 400,000 years there have been four major periods of glaciation -- meaning that vast sheets of ice covered a good part of the globe -- interrupted by brief interglacial periods. We are in one of those periods right now. This is all part of the Pleistocene Ice Age which began in earnest two and a half million years ago. It's still going on, which means that we are still living in an ice age. That's the reason there's so much ice at the poles. Thirty million years ago the earth had no ice on it at all.

So, then, what about carbon dioxide, the great villain of the Global Warming alarmists? Where does that fit in to this picture? Not as neatly as you might think.

Temperatures and carbon dioxide levels do not show a strong correlation. In fact, over very long time spans -- periods of hundreds of millions of years -- they are often completely out of sync with each other.

Over and over again, within virtually any time frame, we find the climate changing -- for reasons we do not fully understand. But we do know there are many more factors in play than simply the concentration of CO2 in the atmosphere -- factors such as the shape and size of the earth's elliptical orbit around the sun, activity from the sun, and the amount of wobble or tilt in the earth's axis, among many others. Even the relatively short 300-year period from the peak of the Little Ice Age to the present has not been steady. The latest trend has been a warming one, but it began nearly a century before there were significant carbon dioxide emissions from burning fossil fuels. And, there has been no significant warming trend in the 21st century. Contrary to media headlines, the trend over the past couple of decades has been essentially flat.

Meanwhile human-caused CO2 emissions are higher than ever. About 25 percent of all the CO2 emissions from human sources have occurred during this period of no net warming.

So, what are we in for next? Will the temperature resume an upward trend? Will it remain flat for a lengthy period? Or, will it begin to drop? No one knows. Not even the biggest, fastest computers.

For the complete script, visit https://www.prageru.com/videos/what-t...

Loading...

Advertisement
When autoplay is enabled, a suggested video will automatically play next.

Up next


to add this to Watch Later

Add to

Loading playlists...