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The figures look quite implausible to me. He claims that the total number of books sold in the US annually is only 25 million. For a country of 300 million people that figure looks nonsensical. A short google search brought up figures of > 3 billion books sold annually, which looks much more plausible. If someone who has supposedly worked extensively in the industry gets such a figure wrong to such an extent, then how reliable are the other figures?
Anyway, looking at my total ecological impact the ebook reader is probably negligible.
As to the life span of batteries: I have used my Sony Ericsson mobile phone for over four years now and I haven't yet seen any noticeable deterioration of battery life.
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