Indigenous Mapuche occupied four oil wells in the Vaca Muerta region in the southwestern Argentine province of Neuquén on July 16 to protest a $1 billion agreement between the state-controlled Yacimientos Petrolíferos Fiscales (YPF) oil company and the California-based Chevron Corporation to drill for oil in the area's shale deposits. (In an earlier item we wrote erroneously that the drilling was for natural gas.) The Mapuche say that the drilling, which uses the controversial method known as hydrofracking, will damage the local environment, and that the agreement was made without the required prior consultation with the indigenous communities. The protesters were also expressing solidarity with indigenous Ecuadorians who won a $19 billion judgment in 2011 against Chevron for environmental damage. The company refuses to pay.

In a press conference on July 11 representatives of Argentina's indigenous Mapuche and of indigenous communities in the Vaca Muerta region in the southwestern province of Neuquén announced plans to block the California-based Chevron Corporation from drilling for natural gas in their territories. In December 2012 Argentina's state-controlled Yacimientos Petrolíferos Fiscales (YPF) oil company signed an agreement for a $1 billion hydrofracking pilot project in the Vaca Muerta area, despite a November decision by an Argentine judge to embargo Chevron's assets in Argentina because of a $19 billion judgment against the company in Ecuador for environmental damage and injuries to the health of indigenous residents in the Amazon rainforest. YPF and Chevron are scheduled to sign an additional accord on July 15; the oil companies deny that the drilling will be on Mapuche lands.

An Argentine judge on Nov. 8 embargoed the assets of Chevron corporation in the country, in a win for plaintiffs trying to collect on a $19 billion judgment against the company in Ecuador for environmental damage in the Amazon rainforest. Judge Adrian Elcuj Miranda upheld a petition filed by an Ecuadoran court under terms of a regional pact, the Inter-American Treaty of Extraterritorial Enforcement of Sentencies.  The embargo covers 100% of local subsidiary Chevron Argentina's stock—valued at roughly $2 billion—as well as its 14% stake in the company Oleoductos del Valle, 40% of the company's oil sales to refineries, and 40% of the funds it has deposited in Argentine banks. Chevron is the fourth-largest oil producer in Argentina, with output of 35,000 barrels per day in 2011.

On Oct. 9, the US Supreme Court declined to hear Chevron corporation's bid to block global enforcement of a $19 billion judgment by a court in Ecuador, a victory for 30,000 rainforest dwellers who brought litigation over the pollution of their lands. Chevron had asked the high court to uphold an injunction imposed in March 2010 by US Judge Lewis Kaplan in New York that would have barred worldwide enforcement of Ecuador's judgment. That injunction was overturned in January by the US Second Circuit Court of Appeals, which ruled that the oil company could challenge the Ecuadoran judgement "only defensively, in response to attempted enforcement," which the rainforest dwellers had not attempted and might never attempt in New York. The Supreme Court's rejection of the case lets the Second Circuit decision stand.

It hasn't won the merest fraction of the coverage enjoyed by the London Olympics, but last week's massive Chevron oil refinery fire in Richmond, Calif., sent hundreds of people rushing to hospitals, darkened the skies over East Bay, and has gasoline prices headed back up towards $4 a gallon. AP notes this "was just the latest pollution incident at the facility that records show has increasingly violated air quality rules over the past five years. The refinery is one of three such facilities near San Francisco that rank among the state's top 10 emitters of toxic chemicals, according to the US Environmental Protection Agency's Toxic Release Inventory. Chevron's Richmond refinery...has been cited by San Francisco Bay area regulators for violating air regulations 93 times in the past five years."

The US Court of Appeals for the Second Circuit in Manhattan on Jan. 26 overturned an injunction won by Chevon Corporation to block enforcement of what the US oil company claims is a fraudulent, multibillion-dollar judgment in Ecuador for polluting the Amazon rainforest. In reversing the decision made by the US District Court for the Southern District of New York, the Second Circuit held that Chevron may not challenge the approximately $18 billion Ecuadoran judgment before enforcement of that judgment has actually been sought by the Ecuadoran plaintiffs. In its interpretation of the Uniform Foreign Money-Judgments Recognition Act, the court concluded that judgment-debtors like Chevron can challenge a foreign judgment's validity under the Act only defensively and in response to an attempted enforcement. The court found that an effort of enforcement by the Ecuadoran plaintiffs had not yet been undertaken anywhere, and might never be undertaken in New York. While both Chevron and the Ecuadorian plaintiffs have yet to comment on the decision, Chevron has long contended (press release, PDF) that it has never conducted oil operations in Ecuador and that the allegations of environmental and social harm in the Amazon are therefore false.