30 Years After Bhopal Disaster

Members of various organizations representing victims of the Bhopal gas tragedy burn an effigy of Dow Chemical Co., which bought Union Carbide, on the 30th anniversary of the Bhopal gas tragedy in Bhopal, India, Dec. 3, 2014.

Indian motorists drive past a poster bearing the name of the Union carbide company during a march by Bhopal Gas disaster victims to commemorate the 30th anniversary in Bhopal, Dec. 3, 2014.

Activists from Bengaluru Solidarity Group, a social group, hold candles and placards during a vigil to commemorate the 30th anniversary of Bhopal gas tragedy, in the southern Indian city of Bengaluru, previously known as Bangalore, Dec. 2, 2014.

Bhopal Gas disaster survivors shout slogans as they burn an effigy during a protest rally in Bhopal, Dec. 2, 2014. The Bhopal industrial disaster, the world's worst industrial disaster in 1984 when gas leaked from a pesticides plant owned by the US multinational Union Carbide, killed about 4,000 people on the night of December 3, 1984.

Members of student groups and activists of social organizations participate in a candle light vigil to express solidarity with the Bhopal gas tragedy survivors on the eve of its 30th anniversary in Bangalore, India, Dec. 2, 2014.

A reactor tank stands among the ruins of the abandoned former Union Carbide pesticide plant in Bhopal, Nov. 14, 2014. On the night of December 2, 1984, the factory owned by the U.S. multinational Union Carbide Corporation accidentally leaked cyanide gas into the air, killing thousands of largely poor Indians in the central city of Bhopal.