POTTSVILLE (AP) — How’s this for irony: Pennsylvania sits atop 7 billion tons of anthracite coal, but consumers who use it for home heating have been having a tough time getting it this winter. Coal yards in Schuylkill County, the nation’s No. 1 producer of anthracite, say they are rationing coal to existing customers and telling new ones to look elsewhere. "I’ve been burning coal for 20 years, and this is the first year I’ve had any trouble getting it," said George Watts, 68, of Dillsburg, who uses coal in his home and business. The culprit is lack of production....