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B-Tech BT899XL/B Extra-Large Projector Ceiling Mount With Micro-Adjustment For Up To 25kg ProjectorsDescription Specifications Downloads B Tech BT899XL B Extra Large Projector Ceiling Mount With Micro Adjustment For Up To 25kg Projectors BT899XL is a universal projector ceiling mount designed to mount projectors up to 25kg. Compatible with B Tech's System 2 professional range, this mount can be fitted flush to the ceiling or attached to BT7850 50mm poles using the supplied pole adaptor. The Projector Mount is designed with easy adjustment of tilt,
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Best in 7 days
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Best in 7 days
4.8 ★★★★★
Based on 2375 reviews
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Product Reviews
★★★★★ 4
How many trees do we have left?
In this book, the author takes a look at the downfall of civilizations. Yes, that's plural. There are several models of how civilization is progressing. One is that we're getting better and better as time goes by. Another, less popular one states that we are actually in decline, going down from some sort of golden age. You'll find many of these proponents in the old age homes and such. For them, the only disagreement is when we are declining from.
Wright takes a look at the cyclical nature of the rise and fall of civilizations, taking examples from several once- prospering civilizations. This book stands as a call to action that something must be done to grow smartly and be careful on how we allocate the scant resources we have left. While he doesn't hit an anything new, this book's strength is its concise nature. The several examples are familiar and in that have more impact.
The strongest example is one he visits several times to show an analogy of current times: Easter Island. This isolated speck in the Pacific was once a thriving mini-civilization with culture and art. And a lot of trees. These trees helped the islanders fish and raise their ceremonial head sculptures. However, these trees also were a poorly cultivated resource. Someone not too long ago cut down the last tree, and the island is now a wasteland and anthropological curiosity. We are doing the same thing. How many trees do we have left to cut?
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Reviewed in the United States on October 14, 2009
★★★★★ 3
Good on Review Short on Direct Experience
It is an extensive review of the literature on rise and fall of civilizations with observations on our's. Extremely well footnoted and referenced it however suffers from the author appearing to have little direct primary experience in the study of his topic. Nonetheless there is good information here and substantiation of the notion that cultures come and go, frequently going as a result of the lack of capacity necessary to change group behavior in response to certain challenges. He presents compelling evidence that those overwhelming challenges often revolve around irrational and compulsive exploitation of natural resources.
Sadly I share the author's pessimism in regard to our global culture being likely to respond adequately to the ongoing destruction of our livable earthly environment. I fear the planet is headed for a massive kill off in the disturbingly near future.
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Reviewed in the United States on April 13, 2013
★★★★★ 5
I hate to be the kind of person preaching on Doom's ...
This is an impressive quick read. I hate to be the kind of person preaching on Doom's Day, but I do find the definition of progress to be a multi-faceted, direct correlation to humanity, or as this book challenges, inversely related. As Le Corbusier once stated in Towards a New Architecture, "[Progress is] the study of minute points pushed to its limits." I think that we forget that limits do exist. On a sustainability level, we seem to forget that growth is bound to a carrying capacity which is only a constant. We exceed limits in population, in wealth, in energy consumption, and we are doing so blindly because we believe we are progressing. This is the first that I heard the term "progress traps" (which I think Wright may have coined himself), and I believe we seem to fall under the impression that distilling or expanding our limitations is an ultimate form of progress, when in fact, its lack in sustainability will only push us back. If you have the time, it's a pretty quick and enlightening read. If you are still on the fence with the concepts discussed in the book, I recommend finding it at a local library before committing to buy. For me, I recommend it.
Also, if you are interested, there is a documentary based on this book called "Surviving Progress" (2011). I prefer the book so much more, but the documentary wasn't that bad.
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Reviewed in the United States on August 29, 2015
★★★★★ 5
Negro Slave Bible
I like the large print. And, I appreciate the honest commentary.
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Reviewed in the United States on May 7, 2026
★★★★★ 5
None
Format: Paperback
Great book, very informative
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Reviewed in the United States on May 4, 2026
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