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April 04, 2006


Tracy W

On the other hand, thanks to the laws of thermodynamics, increasing energy efficiency has inherent limits. E.g. once you have insulated a house, insulating it even more has lower benefits. You can upgrade office lighting, but once your lighting is something like 95% energy efficient, it is extremely difficult to make it 99% efficient. And once you've located lighting only where you need it, and installed motion sensors and etc, it is difficult to get those gains again when you need more energy efficiency.

The article you link may discuss this, but for some reason my browser does not appear to be downloading it (I see the banner at the top, and then my broswer sits there for ages saying it's downloading the page but not apparently doing so.)

David Jeffery

That's true Tracy, but on a national or international level I don't think we're near the stage where we can't make further energy efficiency gains quite cheaply - there's still lots of low-hanging fruit to be picked.

And as the article says "Efficiency is step one. Displacing fossil fuels with renewable sources is step two."

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