Again, plenty to read and think about in the article; The research is coming from The taxpayer-funded research by the University of Pittsburgh, so doesn’t appear to be funded by a company with an agenda, and the awful after-effects of fracking are not hard to find - even from accredited sources. The article does mention there’s no definitive link quite yet, just correlation.

I have not seen Gasland, but documentaries should not be trusted as scientific fact as they tend to be extremely biased and often produced by non-experts for the sake of entertainment. One thing about the Gasland-debunker to note: I’m not going to do a deep dive on him, but he has an extended history with 3 companies well-known for covering up their contributions to climate change.