Re: In a Bridge
It could be an algae itself.
Last year when diesel prices rose so high many people found that algae contained large amounts of oil that could simply be pressed out of it to be turned into biodiesel.
This could be the solid waste from a similar process.
Most of the algae's used were not harmful to humans or animals, in fact many of the commercial biodiesel producers sold the solid waste as a very nutritious animal feed.
Not saying that's what it is, just what it could be. Maybe that's what they are "researching".