It was estimated with plus-or-minus 10% uncertainty that 4.9 Mbbl (780,000 m3) of oil was released from the well; 4.1 Mbbl (650,000 m3) of oil went into the Gulf.[112] The report led by the Department of the Interior and the NOAA said that "75% [of oil] has been cleaned up by Man or Mother Nature"; however, only about 25% of released oil was collected or removed while about 75% of oil remained in the environment in one form or another.[113] In 2012, Markus Huettel, a benthic ecologist at Florida State University, maintained that while much of BP's oil was degraded or evaporated, at least 60% remains unaccounted for.[114]