Sentences with phrase «fracking sites compared»
In one study researchers found methane levels 17 times higher in drinking water near fracking sites compared to those in non-drilling sites.
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They also compared siblings born to the same mothers who lived near fracking sites before and after it started.
Using records from more than 1.1 million births across Pennsylvania from 2004 to 2013, the researchers compared infants born to mothers living near a drilling site to those living farther away from a site, before and after fracking began at that site.