The article misses the point here.

BHE (Berkshire Energy) is actually heavily based on wind generation and investing heavily in renewables, more than most utilities in the US. They are basically leaders in this area:

https://www.youtube.com/watch?v=tN5pRtFeHEo

For the climate resolution, listen to Warren's answer on this in 2019: https://www.youtube.com/watch?v=xELxlV0-4yA

They let their business operate fairly independently and want to avoid creating bureaucracy which doesn't create value which is how they generally operate.

In Charlie's words: "We're about as good as you can get [in renewables] and you should worry about something else... If this isn't good enough for you we can't help you."