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Hydroelectricity

 

Hydro-electricity is presently the largest contributor to renewable energy worldwide; in Australia and particularly in NSW.

 

Hydro-electricity also is more desirable than wind generation because of a higher capacity factor and ability to produce power on demand.

 

But hydro-electricity is resource constrained as it is difficult to build new dams in the developed countries that are presently heavy fossil fuel consumers.

Dams flood private property and/or National parks and have many self-interested and environmentally concerned opponents.  Hydro-electric schemes interfere with natural river flows and related wildlife, particularly when they involve extensive inundation.  It has become politically very difficult to construct new dams in Australia, even when the potential energy resource is significant. 

Nevertheless in developing countries like China, India and Vietnam there are large hydro-electricity resources that remain unexploited.

 

 

 

 

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Travel

Japan

 

 

 

 

In the second week of May 2017 our small group of habitual fellow travellers Craig and Sonia; Wendy and I; took a package introductory tour: Discover Japan 2017 visiting: Narita; Tokyo; Yokohama; Atami; Toyohashi; Kyoto; and Osaka.  

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Fiction, Recollections & News

A Discourse on History

 

 

 

On Australia Day 2011 again we hear the calls: Change the Flag; become a Republic; reparations for the White Invasion...

There are strong arguments for progress in each of these areas but as the following article discusses we first need to ensure that the changes that must be made are indeed progress; that we don't sacrifice that which has been achieved already.

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Opinions and Philosophy

Carbon Capture and Storage

(Carbon Sequestration)

 

 

 


Carbon Sequestration Source: Wikimedia Commons

 

At the present state of technological development in NSW we have few (perhaps no) alternatives to burning coal.  But there is a fundamental issue with the proposed underground sequestration of carbon dioxide (CO2) as a means of reducing the impact of coal burning on the atmosphere. This is the same issue that plagues the whole current energy debate.  It is the issue of scale. 

Disposal of liquid CO2: underground; below the seabed; in depleted oil or gas reservoirs; or in deep saline aquifers is technically possible and is already practiced in some oil fields to improve oil extraction.  But the scale required for meaningful sequestration of coal sourced carbon dioxide is an enormous engineering and environmental challenge of quite a different magnitude. 

It is one thing to land a man on the Moon; it is another to relocate the Great Pyramid (of Cheops) there.

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