TULSA, Okla., Sept.

BARROW, Alaska, Sept.

Technology and economics drive notable increases in U.S. oil production, but report cites regulatory challenges as potential impediments to future growth WASHINGTON, Aug.

Scientists say a tundra fire in the circumpolar arctic released about as much carbon into the atmosphere as the tundra has stored in the previous 50 years.

WASHINGTON, June 16, 2011 /PRNewswire-USNewswire/ -- Legislation designed to speed the opening of the National Petroleum Reserve-Alaska to production of oil and natural gas should be approved as part of a larger effort to make more U.S.