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An Inconvenient Truth

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Brandon
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« on: January 22, 2007, 08:12:15 pm »

For those who have not seen the movie yet..

Part1

quote:
--------------------------------------------------------------------------------
In Touch

You listen to a river gently rolling by.
You notice the leaves rustling in the wind.
You hear the birds, you hear a tree fall.
In the distance you hear a cow.
You ..
It's quiet, peaceful.
And all of a sudden, it's a gear shift inside you.
And it's like taking a deep breath
Oh yeah. I forgot about that.

Earth Rise




The next picture was taken on the last Apollo mission, Apollo 17. This one was taken on Dec. 11, 1972 and it is the most commonly published photograph in all of history. And it is the only picture of Earth from space that we have where the sun was directly behind the spacecraft so that the Earth is fully lit up, and not partly in darkness.



The next I'm going to show you has almost never been seen. It was taken by a spacecraft called the Galileo that went out to explore the solar system. As it was leaving Earth's gravity it turned its cameras around and took a time lapsed picture of one day's worth of rotation here compressed into 24 seconds. Isn't that beautiful?




This image is a magical image in a way. It is made by a friend of mine, Tom Dan San(sp?). He took 3000 separate satellite pictures taken over a 3 year period, digitally stitched together. He chose images that would give a cloud free view of every square inch of the earth's surface. All of the land mass is accurately portrayed. When that is spread out it becomes an iconic image.

The Most Ridiculous Thing


I show this because I want to tell you a story about two teachers I had, one that I did not like that much, the other who was a real hero to me. I had a grade school teacher who taught geography by pulling a map of the world down in front of the blackboard. I had a classmate in the sixth grade who raised his hand and he pointed to the outline of the east coast of South America, and he pointed to the west coast of Africa, and he asked, "Did they ever fit together?" And the teacher said, "Of course not! That's the most ridiculous thing I've ever heard." That student went on to be a drug addict and a ne'er do well. That teacher went on to be a science advisor in the current administration.

But you know, the teacher was actually reflecting the conclusion of the scientific establishment at that time: "Continents are so big that obviously they don't move." But actually as we now know they did move. They moved apart from one another, but at one time they did in fact fit together. But that assumption was a problem.

It reflected the well known wisdom:

"What gets us into trouble is not what you don't know, but what you think you know that just ain't so."

This is actually an important point, believe it or not because there is another such assumption that a lot people have in their minds right now about global warming that just isn't so. The assumption goes like this:
"The world is so big is that we can't possibly have any lasting, harmful impact earth environment."

Maybe that was true at one time, but it is not true any more. One of the reasons it is not true anymore, because one of the most vulnerable parts is the atmosphere vulnerable because it's so thin. My friend the late Carl Sagan used to say that if you have a globe with a thin coat of varnish on it, the thickness of that varnish relative that globe is pretty much the same as the thickness of the earth's atmosphere compared to the earth itself. It is thin enough that we are capable of changing its composition.

That brings up the basic science of global warming. I'm not going to spend a lot of time on this because you know it well. The sun's radiation comes in the form of light waves and heats up the earth. Some of The radiation that is absorbed and warms the earth is re-radiated back into space in the form infrared radiation. Some of the outgoing infrared radiation is trapped inside the atmosphere. That is good thing because it keeps the temperature of the earth within certain boundaries, keeps it relatively constant and livable. But the problem is that this thin layer of atmosphere is being thickened by all of the global warming pollution that is being put up there. What that does is it thickens this layer of atmosphere. More of the outgoing infrared is trapped. So the atmosphere heats up worldwide.
« Last Edit: January 22, 2007, 08:34:17 pm by Brandon » Report Spam   Logged
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