The point was that many species of algae already produce and release it. Using some of them as feed does not introduce additional emission sources, unlike artif

The point was that many species of algae already produce and release it. Using some of them as feed does not introduce additional emission sources, unlike artificial production would. Slow release in the cow might help to smooth out the dose so it inhibits methane generation throughout the whole digestion time. But that part is entirely speculation on my part. Something has to make this particular alga better than the others tested.