So long as relative production costs differ between countries, there are gains to be had from trade.

ECONOMIST: Trade winds | The

Rather, the public should know that air emissions associated with hydraulic fracturing (where they exist) remain a small part of a very large and complex issue, that the oil and gas production industry has long done its part to reduce air emissions from a variety of sources, and that reasonable minds can differ about whether the new regulations make sense as adopted.

FORBES: Why Anti-Fracking Groups Are Shifting Their Story From Water To Air Quality