Steve GannTears for Cassandra
February 10th 2009 02:44
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The World In Which We Live.
January 20th 2009 12:49
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Posted By: JohnH - Category: Global Warming
Greening the Planet 101
December 14th 2008 12:42
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Posted By: JohnH - Category: Global Warming
The Need for Radical Change -- Our Carbon Footprint
May 26th 2008 13:56
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Posted By: JohnH - Category: Global Warming
King Coal MUST Abdicate!
March 12th 2008 02:21
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Posted By: JohnH - Category: Global Warming
The Ides of March or The Blind Man's Lantern
February 22nd 2008 08:31
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Posted By: JohnH - Category: Global Warming
The Nuclear Debate and Renewable Alternatives
February 27th 2007 12:55
First off, I am not anti-nuclear. I believe that nuclear energy will eventually play an important role in supplying energy. My belief is that that time is not yet. I have followed the progress of this technolgy and the various steps it has made over the years.
There are two significant problems. One, is that these massive heat engines operate at very high temperatures. The second problem is that the fuel material, whatever it is, operates in a central core topolgy. This is done to concentrate the energy generated and to pass it then through a heat exchanger which boils the water to drive turbines. Because of the high temperatures used and the inherent problems in controlling nuclear materials at a sub-critical level, there is danger of equipment failure or material degeneration. It is difficult to anticipate and hard to montor these aspects in fully operating plant. Think of three of these reactors operating side by side and it does start to get complicated, even dangerous[ Click here to read more ]
There are two significant problems. One, is that these massive heat engines operate at very high temperatures. The second problem is that the fuel material, whatever it is, operates in a central core topolgy. This is done to concentrate the energy generated and to pass it then through a heat exchanger which boils the water to drive turbines. Because of the high temperatures used and the inherent problems in controlling nuclear materials at a sub-critical level, there is danger of equipment failure or material degeneration. It is difficult to anticipate and hard to montor these aspects in fully operating plant. Think of three of these reactors operating side by side and it does start to get complicated, even dangerous
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Truth and Consequences
February 8th 2007 23:13
In the early 50s of the last century, Astounding magazine (later Analog) published a short novella entitled The Cold Equations. In the story a young girl stows away on a spaceship, not realising that she will have to be jettisoned because the fuel needed for the journey is calculated so precisely.
The story by Tom Godwin, created quite a stir, not because of the evocative nature of the subject, but because of the concept that some laws cannot be avoided. Their consequences are inevitable. And if we do choose to ignore them, we do so at our peril[ Click here to read more ]
The story by Tom Godwin, created quite a stir, not because of the evocative nature of the subject, but because of the concept that some laws cannot be avoided. Their consequences are inevitable. And if we do choose to ignore them, we do so at our peril
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Posted By: JohnH - Category: Global Warming
A Challenge for the Future.
December 6th 2006 12:06
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Posted By: JohnH - Category: Global Warming
John Howard - Environmental Warrior
November 14th 2006 23:15
John Howard on Matters Green
John Howard in a Kermit costume, sitting on a log, singing: It's not easy being green - has a certain whimsical feel to it. It is unreal, hollow and unconvincing.
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John Howard in a Kermit costume, sitting on a log, singing: It's not easy being green - has a certain whimsical feel to it. It is unreal, hollow and unconvincing.
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Posted By: JohnH - Category: Global Warming
Being Green and Being Committed.
November 5th 2006 04:14
An Open Letter to the Prime Minister of Australia
Dear Prime Minister
I read with interest your response to the rally organised for those wishing to do something about the environment - was it Friday? I also note with interest your response to the report sponsored by the British government, other scientists and former US VP Al Gore. Prime Minister in each case you reject their thoughts or are rabidly following the sceptics' view. With respect, sir, you are wrong
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Posted By: JohnH - Category: Global Warming
Making a Difference!
November 1st 2006 17:12
Making a Difference!
We are in the middle of a conversation and for a moment, we stop as we realise that nothing more need be said. On this topic, we are in agreement[ Click here to read more ]
We are in the middle of a conversation and for a moment, we stop as we realise that nothing more need be said. On this topic, we are in agreement
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Posted By: JohnH - Category: Global Warming
Who's Truth?
November 1st 2006 16:25
Who's Truth is it Anyway?
It is interesting to ponder how much of the truth we can digest, but whose truth is it anyway[ Click here to read more ]
It is interesting to ponder how much of the truth we can digest, but whose truth is it anyway
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Posted By: JohnH - Category: Global Warming
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