InsideClimate: Methane contamination of Colorado water wells from nearby fossil fuel development is likely due to faulty oil and gas well construction rather than hydraulic fracturing, according to a new study of aquifer contamination in the state. The study, published in the Proceedings of the National Academy of Sciences on Monday, is the latest to pinpoint the sources and pathways of methane reported in residential drinking water near drilling sites, a concern to many communities as the fracking boom has spread...