Since producing a Michigan Watch series on the "hydraulic fracking" boom in Michigan last September and October on Michigan Radio, not much has been said or done about this method of drilling for natural gas.
A leak has now put the issue back in the news.
The Associated reports a leak has shut down a drilling operation not too far from Traverse City.
It's not yet clear whether it will damage underground water sources. It does raise questions as to whether Michigan regulations are adequate to protect the environment while exploiting the gas reserves in the state.