I disagree vehemently that the LT effects of government policy can be seen, at least in this context, better (or at all) than science-based predictions of the effects of warming & rising seas, melting polar ice and glaciers, etc.
It also seems to me that the hue and cry of the destructive effects of progressive economic/environmental regulation is almost inevitably overstated. If global warming is serious problem (and it seems to be, deniers notwithstanding), then the odds of the private sector acting unilaterally to take action to address it are slim and none. There will have to be additional regulations implemented, which will be resisted to the bitter end by business and their allies in government accompanied by no end of horror stories of economic ruin if they do pass. And when they do pass, businesses will adjust, and life, and economic prosperity, will go on as it has after every other economic/environmental regulation has been passed, despite warnings of economic apocalypse should it pass (and that has yet to occur).