"The vast majority of the oil is gone," said Carol Browner, President Obama's top energy and climate adviser, on the Today Show.
The New York Times reports that scientists say Browner's claim "is not backed up by either the report or the conditions in the ocean."
The Times adds, "The scientists say that although much of the oil is out of sight, it is still present in the water. The report estimated that 26 percent of the oil has dispersed... the dispersed oil is less visible but is not gone from the ocean.
Pedro Alvarez, chairman of Rice University's civil and environmental engineering department, said, "What they're not saying is that probably most of the oil is still in the water. That's my main beef."
Alvarez adds that dispersed oil "migrates easier, and therefore it reaches more eco-receptors, more marine life... Dilution should not be the solution to pollution."