The contention is that Chevron was responsible for environmental contamination actually caused by another oil company, Texaco, which operated in the area between 1964 and 1990.

CENTERFORSECURITYPOLICY: Center For Security Policy

Recently, Chevron and Stratus knocked heads over a Portland, Oregon environmental contamination site that Chevron and other oil-related companies have been sued over.

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LIMA, Peru (AP) Peru's government declared an environmental state of emergency on Monday in a remote Amazon jungle region it says has been affected by years of contamination at the country's most productive oil fields, which are currently operated by Argentina-based Pluspetrol.

NPR: Peru Declares Amazon Oil Contamination Emergency

Research scientists used microarrays to investigate how the microbial community responded to the contamination and how they may have consumed much of the oil and gas.

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His ministry said in a statement posted on its website that the government began administrative actions against Pluspetrol in March 2012 over contamination at block 1AB, long Peru's biggest crude oil field.

NPR: Peru Declares Amazon Oil Contamination Emergency

The fields have been operated for roughly 12 years by Pluspetrol, the country's biggest oil and natural gas producer, and it will be obliged to clean up the contamination, said Environment Minister Manuel Pulgar-Vidal.

NPR: Peru Declares Amazon Oil Contamination Emergency

Lawyers for the oil industry say the vast majority of the plaintiffs have given them data that show very low levels of MTBE contamination in the small parts per billion category.

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