The proposed Keystone XL pipeline would carry heavier crude oil produced from tar sands in Canada.

VOA: special.2011.07.08

After rising steadily since last week, oil prices dipped for a second consecutive day amid reports of growing U.S.crude inventories.

VOA: standard.2009.08.05

High in those mountains, behind a crude earthen dam, wealthy Pittsburgh industrialists and their friends sailed yachts on a pretty private lake.

VOA: standard.2010.04.26

Security analysts say the oil industry remains vulnerable to opportunistic attacks, crude oil thefts and kidnappings.

VOA: standard.2009.12.21

Geithner,who appeared on CBS' "Face the Nation" program, called it the "crude reality" of recoveries.

VOA: standard.2009.04.05

It arrested two Swiss businessmen, threatened to cut off crude oil deliveries, withdrew its money from Swiss banks, and told Swiss International Air Lines it could no longer fly to Tripoli.

VOA: standard.2009.08.23

Experts say terrorist groups are seeking materials for a crude nuclear device - a so-called "dirty bomb" - that would have limited blast potential but could spread radiation in a major urban area.

VOA: standard.2010.04.11