Can be used to dissipate oil slicks and were widely used during the Deepwater Horizon Oil Spill. A dispersant is either a non-surface active polymer or a surface-active substance added to a suspension of particles. Dispersants can rapidly dispense large amounts of certain oil types from the sea surface by transferring it into the water column. They will cause the oil slick to break up and form water-soluble micelles that are rapidly diluted. Watch and wait method is also used. In some cases the best way to fight an oil spill is to rely on Mother Nature and natural attenuation of oil and this is most effective in ecologically sensitive areas such as wetlands.