I suggested sending the US Navy's portable nuclear reactors (such as carried in the Enterprise and other aircraft carriers) to aerate the ocean surrounding the oil geyser. It was entirely impractical - a navy blogger responded to my email with a blog post (and a link) to say it was a terrible idea.
The Enterprise has since been retired, and is currently being disposed of. But I think the core of the idea is still valid. Aeration would help deal with all this agricultural runoff...
Maybe I'll write a new post for my neglected website: http://SendTheEnterprise.org/