BP

The giant British Petroleum (London: BP.L - news) said the spill in the Gulf of Mexico was the result of an unprecedented combination of failures and in-house while investigating the disaster has focused on the work of other companies .

Meanwhile, on Tuesday there was a change in the color of the oil that comes from the well. BP said it was not a permanent change, but the engineering professor Bob Bea of the University of California at Berkeley said it could indicate that the flight arrived in a pool of more oil and less gas, which is more polluting.

On Monday night BP PLC submitted to the authorities one of their first reports on their research.

In his paper said that several control mechanisms must be sufficient to prevent the accident that began with the explosion of a platform on April 20 off the coast of Louisiana, killing 11 workers.

The largest producer of oil and gas in the Gulf of Mexico identified seven mechanisms by which paid special attention in their search for a cause.

Now the problem still about Gulf.