By now, you've probably read that Berkshire Hathaway, the investment firm led by Warren Buffett, has sold most if not all of its holdings in PetroChina. PetroChina is the publicly listed unit of the China National Petroleum Co., which has come under harsh criticism for doing business with the repressive government of Sudan.
Heartened by Buffett's action, Darfur activists are now shifting their focus to other investment funds, including Fidelity, that continue to hold PetroChina stock.
Meanwhile, oil companies are facing pressure...
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