- who is 'we'? The policy-makers? The voters? They voted a climate-change-denier into the presidents chair. Not fair? Should've listened to those fear-mongerers telling you to stop using Facebook as a source of news.
- how to deal with the global economy? There is no 'central' plan. Funding green energy will just shift the balance to other countries.
- who is going to produce so many electric cars in such a short amount of time? Without transportation, you will risk civil unrest.
- how would you produce steel? How to prevent movement of steel production to developing countries?
- how will you transform the agricultural industry? Even if you start now, the transition to 0% fossil fuel usage will take at least a decade. The supply of lithium and the battery production capacity are simply too low.
- if you subsidise green energy, you will also promote the inefficient production of the goods necessary for this new market. The inefficient production can and may happen oversea, causing you to just shift the problem to China or elsewhere.
- "the alternative of runaway climate change is far worse". You cannot influence the global markets. If the nationalisation/taxation will cause civil unrest and an illegal usage and trade in fossil fuels, the alternative might be better! At least the (legal) usage and trade is subject to international oversight.