Answer:
Michael Pollan is the author of the book called Omnivore. In the book he named four food chains which include Industrial, Big Organic, Pastoral, and Hunter-Gatherer.
These food chains have their advantages and disadvantages but the Big Organic is the best due to it being purely natural. It is usually without any form of additives which are synthesized artificially. It also helps in soil nutrients replenishments and subsequent increase in agricultural yield.
In vertical files libraries store small printed material. They does not contain original documents or coprehensive information about particular subjects, it usually poses as photocopies, or papers with simple non essential information.
It won't be helpful for studying, but it can be a lot of fun, because you will never know what exactly you can find in there.
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