News roundup: Canada’s Potash to spend over $52M at plants in La., Fla. and N.C. in Clean Air Act case … La. rig count down three on the week … US consumer borrowing up to record $15.9B

Clearing the air: Potash Corp. of Saskatchewan Inc. has agreed to spend more than $52 million on plant improvements and pay a $1.3 million civil penalty to resolve U.S. charges that it violated the Cl…