Petroleum microbiology oil while A. borkumensis simutaneously increases synthesis of anionic glucoproteins, which are used to emulsify hydrocarbons in the environment and increase their bioavailability. The presence of crude oil along with appropriate levels of nitrogen and phosphor catalyzes the removal of petroleum either by mechanisms that enhance the efficiency of substrate uptake or by direct biodegradation of aliphatic chains. Two well-known oil spills exemplify large scale marine bioremediation applications: In 1989, the Exxon Valdez ran aground, spilling 41.6 million liters of crude oil, and launching one of the first major bioremediation efforts for an oil spill. Cleanup of Alaskan shorelines relied
Exxon Valdez steel were removed and replaced that July, totaling US$30 million of repairs to the tanker. Its single-hull design remained unaltered. The Exxon Valdez spill occurred under President George H. W. Bush, whose EPA Administrator William K. Reilly played a significant role in mobilizing presidential support for action to contain and clean up the spill. Litigation was filed on behalf of 38,000 litigants. In 1994, a jury awarded plaintiffs US $287 million in compensatory damages and US $5 billion in punitive damages. Exxon appealed and the Ninth Circuit Court reduced the punitive damages to US $2.5 billion. Exxon then appealed the