article_snippet: But scientists say to really understand an area's weight problems you need to go underground into the grimy depths of the sewage network.
article_snippet: Here, scientists claim, raw waste can be analysed to reveal the urban 'microbiome', offering glimpses into disease trends on a wider scale.
article_snippet: Now scientists say this community can be analysed from a community's sewage system .
article_snippet: holds true when these microbiomes are mixed together in the sewage network. 
article_snippet: holds true when these microbiomes are mixed together in the sewage network.
article_snippet: The way we have been working with microbiomes of individuals has been similar to driving around and mapping the streets and structures of a city in a detailed manner. '