This is algae, specifically cyanobacteria (which isn’t terribly specific at all, but more specific). Yesterday with my marine biology class I toured the facilities of a company called Agrotech that is working on making algae profitable. They can be used for food colorings, feed for animals, feed for humans, biofuels, and all sorts of other things.
They cultivate the algae in these big long tubes that circulate the little buggers around. This particular set-up is 250 meters long, but it loops around several times.
There are still a ton of things to be worked out when it comes to profiting off algae, I learned. Efficient harvesting, preventing contamination, the fact that Denmark ain’t that sunny most of the year, and plenty of other things. It’s an industry that’s still very much in its beginning stages.
Also, this was the cleanest greenhouse I have EVER been in. It was unsettlingly clean.