Nicholas Kusnetz has written for The Nation, Miller-McCune, The New York Times and other publications. He is a graduate of UC Berkeley’s Graduate School of Journalism.
As furious debate over fracking continues in the United States, it is instructive to look at how a similar gas boom is unfolding for our neighbor to the north.
More than 14,000 oil-and-gas companies were active in the United States in 2009. But multinational giants like Exxon Mobil and BP now produce much of the nation's gas.
The leak resulted from a faulty weld that hadn't passed inspection and other sections of the pipeline appear to have been installed without proper evaluation.
A few states now require companies to disclose some of their fracking chemicals, but some say the requirements aren't enough to understand health and environmental risks.
There's been warnings for decades that abandoned wells can provide pathways for oil, gas or brine-laden water to contaminate groundwater supplies or to travel up to the surface.