Good points. I would only add that the nature of ‘national security’ is changing as climate impacts mount. The military has actually been a leader in preparedness for climate change and new environmental impacts. Such impacts can weaken our country by depleting our resources (or decimating them, like glaciers/mountain ice packs, rivers) and triggering many ‘downstream’ (pun intended) crises. Military war gaming already incorporates climate shifts and ecological disasters as trigger events (local, regional, even global warfare).
But if you really want to know how serious the problem is, just look at the Insurance Industry which, arguably, was the private sector leader in climate change acceptance. After all, the potential impacts are predicted to cause floods, crop losses, pestilence, wildfires…more…all of which communities of various sizes (and yes, the government too) requires insurance! Climate Science produces a LOT of data, and Insurers LOVE data. And so, they looked at the data, all of it, really, really well. And having done so, they concluded that Climate Change was real and likely to get worse.
The Insurance Industry has been integrating climate change impact calculations in its insurance estimates for over 15 years now. When I first learned of this development – in the midst of growing (human-caused) climate change denialism and disinformation – I knew right then and there that the Climate Science arguments would win out (the ‘signal’ hidden in the ‘noise’ of disinformation)…The industry was literally already “putting its money [betting its future] where its mouth was”…The risk of not taking Climate Change seriously was much greater than taking it seriously and adjusting costs estimates and payouts accordingly (whether we will be able to afford this insurance in the future is another matter). When faced with the question of whether to be concerned about Climate Change, or, to conduct business as usual (we can just adapt, etc.)…I would remind myself: Think like an insurance company!