Chief Oil & Gas

MILWAUKEE (Reuters) - Political money has poured into Wisconsin in recent months - not for the presidential or Senate races but for a state vote getting national billing as a battle for the interests of the middle class.

NEW YORK (Reuters) - Independent energy producer Chief Oil & Gas has been fined $180,000 by Pennsylvania regulators for environmental violations in the Marcellus Shale, the Department of Environmental Protection said on Tuesday.

DALLAS/SAN RAMON, California (Reuters) - Large blocks of investors in the two biggest U.S. oil companies on Wednesday demanded more disclosure about the environmental risks of extracting oil and gas through hydraulic fracturing.

DALLAS/SAN RAMON, California (Reuters) - Large blocks of investors in the two biggest U.S. oil companies on Wednesday demanded more disclosure about the environmental risks of extracting oil and gas through hydraulic fracturing.

NEW YORK (Reuters) - Chevron Corp <CVX.N> will buy 228,000 acres in the Marcellus Shale, expanding its position in the one of the hottest natural gas shale fields under development in the United States.

WASHINGTON (Reuters) - A fireball and explosion burned seven members of a crew drilling for natural gas at an abandoned coal mine in West Virginia on Monday, the second big fire at an energy formation known as the Marcellus Shale in less than a week, a government worker said.