If this were in fact their NUMBER ONE priority, it would be front and center on their agenda, not buried in fine print.
I think the truth is they don't know what to attempt to do other than throw money at it.
At least a proposed carbon tax would be a something concrete and specific, how well it worked could be subject to discussion. But, it's unpopular of course. Canada has one, it's insufficient and not really doing much of course, but they have one.