The Deepwater Horizon Oil Spill
This spill was the largest in the history of the oil industry and spread over huge areas.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Skimming Oil in Gulf of Mexico | Flickr - Photo Sharing!."
http://www.flickr.com/photos/dvids/4722374550/
Flickr
CC BY.