Little known about oil dispersants, experts say

Oil from BP Plc's(BP.N) blown-out well has stopped flowing into the Gulf of Mexico and so far there is little sign of the 1.8 million gallons of dispersants used to combat the oil slick.

Oil from BP Plc's(BP.N) blown-out well has stopped flowing into the Gulf of Mexico and so far there is little sign of the 1.8 million gallons of dispersants used to combat the oil slick.

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"A massive ecotoxicological experiment is underway," Ronald Kendall, director of the Environment and Human Health Institute at Texas Tech University, told the Environment and Public Works Subcommittee on Oversight.

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