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Of academic papers I've read recently, this one stands out:
http://doi.org/10.1038/s41467-018-03202-2

It's a study of 1000 genetically similar people in Quebec and their neighbours.

Researchers found that air pollution levels by postal code predicts risk factors for disease better than DNA. Gene expression patterns were discernible within the group of 1000 people - you could tell where they lived. Those patterns were shared by their genetically dissimilar neighbours.