Comment by chneu
Again, American dairy farmers would never adopt this without massive subsidies. Even then they would fight it like they do every environmental regulation(of which there aren't many). If they can't increase profits they will not do it.
Finland is not the US. Americans will try everything else before doing what other countries do because we believe we are different/exceptional.
I agree it's a good idea. It just isn't feasible in the United States for a variety of reasons.
Dairy-based biogas "RNG" is done at scale in the United States already, there are hundreds of large anaerobic digesters across the country turning cow waste into biogas