BP spokesman Jon Pack defended the use of Corexit by saying their attention is focused on plugging the leak [gusher], and not what dispersant is used. “It’s a chemical [Corexit] that the oil industry makes to sell to itself, basically,” said Richard Charter, a senior policy advisor for Defenders of Wildlife. Alan Levine, the head of Louisiana’s Department of Health and Hospitals, said: “We don’t have any data or evidence behind the use of these chemicals in the water. We’re now basically using one of the richest ecosystems in the world as a laboratory.”