Are we impeding the future by using electronic storage mechanisms?

Are we impeding the future by using electronic storage mechanisms?
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This topic was raised in an article I read this week under the headline that all knowledge could be forgotton. Unfortunately I cant remember where I read it !! I also read elsewhere that some digital data will start to deteriorate after about 20 years. Im no expert on this, but I definitely think that more thought needs to be put into this subject for the sake of future generations.
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