This is especially interesting
This is interesting to me mainly because most of those "environmental organizations" are thugs for hire hiding behind a green banner.
So the question is: who paid them and activated them this time? Call me a skeptic but they had more than two years to come to the conclusion that NSII is
bad for the environment. And they did nothing about it.
So, obviously not Russia. They're in a hurry to finish the pipe before the provisional gas deal with Ukraine expires in 2022.
And it was most likely not the German government (Merkel still insists that NSII is a "purely business project"). Unless the government knows that the US sanctions will sink the pipe anyway and Merkel is looking for some options to save her face? It is much better to say that she
changed her mind because of the environmental concerns coming from a German NGO than because of the pressure coming from America (which was also initiated by D. Trump on top of that).
The easiest guess would be that the US did that. To double the impact of the ongoing and the incoming sanctions.
But since NABU's total financial assets are around 27 mln. euro* anyone could've influenced them financially even one of the governments of a tiny Baltic states...
en.wikipedia.org/wiki/Naturschutzbund_Deutschland