The lib-dems could sit on the fence about independence for all I care. Even if they sat on the fence of active travel it might be excusable for to come off their fence and go as far as possible to the drive where we like when we like and the climate be damned is not a good move for anyone to make.
I'm struggling to see what party is currently available to vote for if you want to halt climate change and reduce local pollution but aren't actively supportive of independence.