In Florida researchers find oil traces in a Gulf Stream . Plankton showed ` ` strong toxic response '' to the crude , initial results show . Critics warned the full effect of the dispersants on the food chain was not known and that their use in deep water effectively concealed the full extent of the spill . Researchers say the oil will disappear later .
In Florida researchers find oil traces in a Gulf Stream . Plankton showed ` ` strong toxic response '' to the crude , initial results show . Researchers say the oil will disappear later .