New federal air rules for drillers expected next week.
The state rules allow drillers to drill on an objecting landowner's land if enough neighbors support the drilling .
Pennsylvania drillers want uniform rules.
New federal rules could cost drillers $1.5 billion.
New federal rules on hydraulically fracturing or fracking federal lands may cost drillers as much as $1.5 billion.
BALTIMORE — A state panel that is devising rules for hydraulic fracturing for natural gas in western Maryland may require drillers to have pollution insurance.